The national average for mathematics on a standardized test in 2011 was 518, with a standard deviation of approximately 48.
In statistics, the bell-shaped distribution is known as the normal distribution or the Gaussian distribution. It is characterized by its symmetry and the majority of the data falling within a certain range.
The national average score of 518 represents the central tendency of the distribution. This means that a large number of students scored around this average score.
The standard deviation of approximately 48 measures the variability or spread of the scores. It indicates how much the scores deviate from the average. In a normal distribution, about 68% of the data falls within one standard deviation of the mean.
By knowing the average score and the standard deviation, we can determine the proportion of students who scored above or below a certain score, as well as calculate percentiles and compare individual scores to the national average.
Understanding the characteristics of the distribution, such as the average and standard deviation, helps in interpreting and analyzing the scores, making meaningful comparisons, and identifying students' performance relative to the national average.
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Please Help!!!! What is the final step to prove....
Answer:
D
Step-by-step explanation:
Step 1(Base step) − It proves that a statement is true for the initial value.
Step 2(Inductive step) − It proves that if the statement is true for n=k, then it is also true for n=k+1.
How many solutions does the nonlinear system of equations graphed below
have?
The curves are intersecting at (-1.75, 2.5) and (1.75, 2)
Nonlinear functions include all functions that are not linear. The following are some instances of nonlinear functions: f(x) = x2 - 2x + 2, ln (x), ex, etc.
In the above question, a graphical representation of non-linear system of equations is given
We need to find the solution of this non-linear system of equations based on the graphical representation
We can find the solutions from the graph, wherever the curves are intersecting, that intersection point is known as the solution of the non-linear system of equations
We can clearly see that, the curves are intersecting at
(-1.75, 2.5) and (1.75, 2)
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Shelly has $300 to shop for jeans and sweaters.
Each pair of jeans cost $65, each sweater costs $34,
and she buys 7 items. Determine the number of
pairs of jeans and sweaters Shelly bought.
Shelly bought three pairs of jeans and sweaters.
What is a numerical expression?A numerical expression is algebraic information stated in the form of numbers and variables that are unknown. Information can is used to generate numerical expressions.
Shelly is given $300 to spend on jeans and sweaters.
Each pair of pants is $65, each sweater is $34, and she purchases seven pieces.
As per the given question, the required solution would be as:
She could buy three pairs of jeans and three sweaters since any more would be insufficient because three pairs of jeans and three sweaters would equal $297.
65 x 3 = 195
34 x 3 = 102
Therefore, Shelly bought three pairs of jeans and sweaters.
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In a recent election 65% of people supported reelecting the incumbent. Suppose a poll is done of 1390 people. If we used the normal as an approximation to the binomial, what would the mean and standard deviation be?
A standard deviation of 23.16.
In a recent election, where 65% of people supported reelecting the incumbent, a poll was conducted with a sample size of 1390 people.
To approximate the binomial distribution with a normal distribution, we can calculate the mean and standard deviation.
The mean is determined by multiplying the sample size (1390) by the proportion of support (0.65), resulting in a mean of 898.5.
The standard deviation is calculated by taking the square root of the product of the proportion of support (0.65) with the proportion of opposition (0.35), divided by the sample size, and then multiplied by the square root of the sample size.
This yields a standard deviation of approximately 23.16.
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Find the area of a circle with radius 14 mm. Round your answer to the nearest tenth.
Step-by-step explanation:
1cantimeter=10mm
14mm=1.4cm
Area of circle pi r²=pi*1.4²=1.96pi
Solve for x. 4.3 + 3.2x = 23.5
Answer:
x=6
Step-by-step explanation:
4.3 + 3.2x = 23.5
-4.3 on both sides
3.2x=19.2
divided by 3.2
x=6
Let A = (5,-3) and B = (2,0).
1) Determine the component form of AB.
2) AB = __________
3) Determine the coordinates of the point 2/3 of the way from A to B.
1) The component form of AB is (-3-0, 5-2) or (-3, 3). 2) AB = (-3, 3).
3) The coordinates of the point 2/3 of the way from A to B are (3, -1).
1) The component form of AB is (-3-0, 5-2) or (-3, 3).
2) AB = (-3, 3).
3) To determine the coordinates of the point 2/3 of the way from A to B, we can use the formula for finding a point on a line segment. Let's call the point we're looking for C. The x-coordinate of C can be found by taking 2/3 of the difference between the x-coordinates of A and B and adding it to the x-coordinate of A. Similarly, the y-coordinate of C can be found by taking 2/3 of the difference between the y-coordinates of A and B and adding it to the y-coordinate of A.
Using this formula, we can calculate the x-coordinate of C as:
x-coordinate of C = (2/3)*(2 - 5) + 5 = (2/3)*(-3) + 5 = -2 + 5 = 3.
And the y-coordinate of C as:
y-coordinate of C = (2/3)*(0 - (-3)) + (-3) = (2/3)*(3) - 3 = 2 - 3 = -1.
Therefore, the coordinates of the point 2/3 of the way from A to B are (3, -1).
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question 9 of 10 explain how you can determine the sign of the sum of two integers if one integer is positive and the other integer is negative.
To determine the sign of the sum of two integers when one integer is positive and the other is negative, we can follow a simple rule based on their magnitudes.
If the magnitude of the positive integer is greater than the magnitude of the negative integer, the sum will be positive. This is because the positive integer outweighs the negative integer, resulting in a positive value.
On the other hand, if the magnitude of the negative integer is greater than the magnitude of the positive integer, the sum will be negative. In this case, the negative integer dominates and determines the sign of the sum.
In both scenarios, the sign of the larger magnitude integer takes precedence and determines the sign of the sum. It is important to note that the sum will always have the sign of the integer with the larger magnitude, regardless of the specific values of the integers involved.
By considering the magnitudes of the integers, we can easily determine the sign of their sum when one integer is positive and the other is negative.
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A box is filled with 9 yellow cards, 5 red cards, and 6 blue cards. A card is chosen at random from the box. What is the probability that it is a yellow or a blue card? Write your answer as a fraction in simplest form
Answer:
[tex]\frac{3}{4}[/tex]
Step-by-step explanation:
9 + 5 + 6 = 20 (how many cards there are altogether)
9 yellow + 6 blue = 15 (how many cards are either yellow or blue)
so:
[tex]\frac{15}{20}[/tex]
simplified:
[tex]\frac{3}{4}[/tex]
Answer:
[tex]\frac{3}{4}[/tex]
Step-by-step explanation:
There are 20 total cards ( 9 + 5 + 6). 15 of them are yellow or blue(9 + 6). So, the fraction is [tex]\frac{15}{20}[/tex]. [tex]\frac{15}{20}[/tex] simplifies to [tex]\frac{3}{4}[/tex].
Here is my question.
Answer:
5/8
Step-by-step explanation:
if 1/8 is used for one batch . for five batch=1/8*5=5/8
consider the hypothesis test. h0: p1 − p2 ≤ 0 ha: p1 − p2 > 0 the following results are for independent samples taken from the two populations. sample 1 sample 2 n1 = 200 n2 = 300 p1 = 0.25 p2 = 0.13
(a)
Calculate the test statistic. (Round your answer to two decimal places.)
What is the p-value? (Round your answer to four decimal places.)
p-value =
The p- value is approxiamately 0.0001.
To calculate the test statistic, we first need to find the standard error of the difference between the two sample proportions. The formula for the standard error is SE = √(( p1 ×( 1- p1)/ n1)( p2 ×( 1- p2)/ n2)) Substituting the given values into the formula,
we get SE = √((0.25 ×( 1-0.25)/ 200)(0.13 ×( 1-0.13)/ 300)) =0.0326. The test statistic is also calculated as the difference between the sample proportions divided by the standard error.
Test Statistic = ( p1- p2)/ SE = (0.25-0.13)/0.0326 =3.68.
To find the p- value, we compare the test statistic to the applicable distribution. Since the indispensable thesis is one- tagged( p1- p2> 0), we'd use the standard normal distribution. Looking up the test statistic of3.68 in the standard normal distribution table, we find that the corresponding p- value is veritably close to 0.0001.
This means that if the null thesis( H0 p1- p2 ≤ 0) is true, there's a veritably low probability(0.0001) of observing a test statistic as extreme as the one calculated from the sample data. Hence, we've strong substantiation to reject the null thesis in favor of the indispensable thesis( Ha p1- p2> 0).
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what is the measure of ∠x?
Answer:
58
HOPE THIS HELPS
-Todo <3
Step-by-step explanation:
90-32=58
Determine at which points f(z) = Reſiz) is differentiable by using the limit definition of the derivative
Main answer: f(z) = Reſiz is differentiable at every point of the complex plane where partial derivative with respect to x exists and the Cauchy-Riemann equations are satisfied.
Supporting answer: Given f(z) = ReſizLet z = x + iy∴ f(z) = Re(x + iy)z = x - iyi.e. x = ½ (z + z¯)and y = -½i(z - z¯)Hence f(z) = ½ (z + z¯ ) Differentiating f(z) partially with respect to x, we get,fx = ∂(x + y)/∂x = 1And differentiating f(z) partially with respect to y, we get,fy = ∂(x + y)/∂y = 1Now, for f(z) to be differentiable, it is necessary thatfx = uxx + ivxxandfy = uyx + ivyxwhere u = Re (f(z)) and v = Im(f(z))i.e. uxx = vyyanduyx = -vxy These equations are known as the Cauchy-Riemann equations. On substituting, we get uxx = vyy∴ 1 = 0which is not true. Hence f(z) is not differentiable when partial derivative with respect to y exists. So f(z) is differentiable at every point of the complex plane where partial derivative with respect to x exists and the Cauchy-Riemann equations are satisfied.
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Write 6.5.x 10-4
as an ordinary number
Step-by-step explanation:
0.00065
Hope it helps....
5,000 x 683,629,638,953,019.582
Answer:
3418148194765097900
Step-by-step explanation:
Just multiplied
have a great day!
The sum of a number and 12 is 31. What is the number? 31 n 12.
Answer:
N=19
Step-by-step explanation:
BNA Brand New Animal is the best anime
A circle has a radius of 15 cm. Find the diameter
Answer:
15 times 2 = 30
diameter = 30
Step-by-step explanation:
») What is the circumference of the rim of a basketball hoop with a radius of 9 inches? First, multiply the radius by__ to get the diameter__ inches. Then, multiply the diameter by 3.14 (an approximation for 1) to get a circumference of
about__ inches. ») Convince Me! If the diameter is doubled, what happens to the circumference? Explain.
Answer:
First, multiply the radius by 2 to get the diameter 18 inches. Then, multiply the diameter by 3.14 (an approximation for 1) to get a circumference of about 56.52 inches. If the diameter doubles the circumference doubles.
Step-by-step explanation:
18π = 56.52
36π = 113.04
56.52*2 = 113.04
Determine whether the points P and Q lie on thegiven surface.
r(u, v) =‹u+v, u2 - v,u + v2›
P(4, 2,6)
Q(5, 1,-11)
P and Q are on thesurface.
P is on the surface, butQ is not.
Q is on the surface, butP is not.
Neither P or Q are onthe surface.
P(4, 2, 6) is on the given surface, but Q(5, 1, -11) is not. The correct answer is that P is on the surface, but Q is not
To determine whether the points P(4, 2, 6) and Q(5, 1, -11) lie on the given surface, we need to check if their coordinates satisfy the equation r(u, v) = <u + v, u^2 - v, u + v^2>.
For P(4, 2, 6):
Plugging in the coordinates of P into the equation, we have:
r(4, 2) = <4 + 2, 4^2 - 2, 4 + 2^2> = <6, 14, 8>.
The coordinates of P(4, 2, 6) match the coordinates obtained from the equation, so P lies on the surface.
For Q(5, 1, -11):
Plugging in the coordinates of Q into the equation, we have:
r(5, 1) = <5 + 1, 5^2 - 1, 5 + 1^2> = <6, 24, 6>.
The coordinates of Q(5, 1, -11) do not match the coordinates obtained from the equation, so Q does not lie on the surface.
Therefore, the correct answer is that P is on the surface, but Q is not. The given coordinates for P(4, 2, 6) satisfy the equation, while the coordinates for Q(5, 1, -11) do not match the equation, indicating that Q does not lie on the given surface.
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In the diagram, point K is a point of tangency, MK = 720, and MN = 648. What is the radius of J
A. 76
B. 70
C. 72
D. 64
The radius of J is 76. so option A is correct.
What is the Pythagoras theorem?The Pythagoras theorem states that the square of the longest side must be equal to the sum of the square of the other two sides in a right-angle triangle.
|AC|^2 = |AB|^2 + |BC|^2
By applying Pythagoras theorem In right triangle,
(Hypotenuse)² = (Leg 1)² + (Leg 2)²
(720 + J)² = (648)² + J²
518400+ J² + 1440J = 419904 + J²
1440J = 518400- 419904
J = 76
Therefore, J = 76 units is the answer.
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The width of a rectangle is 4 feet and the diagonal length of he rectangle is 13 feet what is the measurement is the closest to the length of the rectangle in feet
Answer:
The length is APPROXIMATELY equal to 12.4.
Step-by-step explanation:
Use the converse of the Pythagorean Theorem ([tex]a^{2}[/tex]+[tex]b^{2}[/tex]=[tex]c^{2}[/tex] [where "c" is both the longest side and the hypotenuse]) since a rectangle's diagonals will always cut it into two right triangles:
[tex]13^{2} = 169[/tex]
[tex]4^{2} =16[/tex]
169-16=153.
[tex]\sqrt{153}[/tex] ≈ 12
or
[tex]\sqrt{153}=12.36931688[/tex]
or if the problem has to be exact (using radicals)
3*[tex]\sqrt{17}[/tex]
I hope this helps ;)
Suppose that a researcher studying public opinion on raising taxes to pay for road repairs finds that in a simple random sample of 541 adult residents of the state, that 345 of the residents agree that taxes should be raised for road repairs. When testing the claim that the proportion of adults who favor raising taxes is greater than 0.60, the P-Value of 0.0367 is obtained.
Interpret this result for someone who doesn't know statistics.
They ask: "what can we know for certain?" Broadly answer their question.
The interpretation of the p-value itself does not provide certainty about the truth or falsehood of the claim being tested.
Instead, it helps assess the strength of the evidence against the null hypothesis the assumption that the proportion is not greater than 0.60.
Based on the provided information and the obtained p-value of 0.0367, there are a few conclusions draw for certain,
The researcher conducted a survey among 541 adult residents of the state regarding their opinion on raising taxes for road repairs.
In the sample, 345 residents out of the 541 agreed that taxes should be raised for road repairs.
The researcher tested a claim or hypothesis that the proportion of adults favoring raising taxes is greater than 0.60 (60%).
The p-value of 0.0367 was obtained as a result of the statistical test.
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Please help !!!!!! Thanks
Step-by-step explanation:
[tex]2 \times 14 \times 13 +12 \times 10 + 14 \times 10 = \\ = 624[/tex]
ANOTHERRR >: D
THANKS FOR ALL THE PEOPLE HELPINGG < 3
Answer: it C trust me it right & can you please mark me Brainliest
Step-by-step explanation: Hope this help :D
☁️ Answer ☁️
C, x < 4.
2/x −3< − 1
Multiply both sides of the equation by 2.
x−6< −2 (negative 2)
Add 6 to both sides.
x < (negative 2) −2 + 6
Add −2 and 6 to get 4.
x < 4
Hope it helps.
Have a nice day noona/hyung.
find the length of the arc on a circle of radius 14 inches intercepted by a central angle 140.
The length of the arc intercepted by a central angle of 140° on a circle with a radius of 14 inches is approximately 34.1557 inches.
To find the length of the arc intercepted by a central angle on a circle, we can use the formula:
Arc Length = (Central Angle / 360°) * Circumference
In this case, the radius of the circle is 14 inches, and the central angle is 140°.
First, we need to calculate the circumference of the circle:
Circumference = 2 * π * radius
Circumference = 2 * π * 14 inches
Now, we can calculate the length of the arc:
Arc Length = (140° / 360°) * Circumference
Arc Length = (140/360) * (2 * π * 14 inches)
Arc Length ≈ (0.3889) * (2 * 3.1416 * 14 inches)
Arc Length ≈ 0.3889 * 87.9648 inches
Arc Length ≈ 34.1557 inches
Therefore, the length of the arc intercepted by a central angle of 140° on a circle with a radius of 14 inches is approximately 34.1557 inches.
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Which of the following would indicate the possible presence of multicollinearity in a regression analysis?
a. a significant p-value for a test of overall significance
b. a high correlation between two or more independent variables.
c. a small value for the coefficient of determination
d. All of these choices would be indicators of possible multicollinearity.
B) A high correlation between two or more independent variables would indicate the possible presence of multicollinearity in a regression analysis.
Multicollinearity occurs when two or more independent variables in a regression model have a strong correlation with one another, making it difficult to distinguish the individual influence of each independent variable on the dependent variable.
Poorly constructed experiments, heavily observational data, introducing new variables that are dependent on other factors, including identical variables in the dataset, incorrect use of dummy variables, or inadequate data can all lead to multicollinearity.
Calculating the variance inflation factor (VIF) for each independent variable is one way for detecting multicollinearity; a VIF value more than 1.5 shows multicollinearity.
To correct multicollinearity, one of the highly correlated variables can be removed, combined into a single variable, or a dimensionality reduction approach such as principal component analysis can be used.
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The scatter plot shows the relationship between annual salary and years of experience. What is the range of the cluster shown in the scatter plot?
A) 1 to 15 years of experience
B) 8 to 12 years of experience
C) $10,000 to $90,000 annual salary
D) $40,000 to $60,000 annual salary
Answer: 8 to 12 years
Step-by-step explanation: A cluster is formed when several data points lie in a small interval. The domain of the cluster is the set of x-coordinates.
The range of the cluster in the scatter plot is between $40,000 and $60,000 when the data points are heavily clustered between the years 8 to 12.
What is scatter plot?Scatter plots are used to observe and plot relationships between two numeric variables graphically with the help of dots. The dots in a scatter plot shows the values of individual data points.
Given that, on scatter plot
Years of experience is represented at x-axis
Annual Salary is represented at y-axis
From the scatter plot, it is clear that from the x-axis the data points are tightly clustered between the years 8 to 12. As major portion of the data points lie between 8 to 12 years.
Similarly, from the y-axis the data points are tightly clustered between between $40,000 and $60,000. As major portion of the data points lie between $40,000 and $60,000.
When the certain data points in a scatter plot make distinct groups, these groups are considered as clusters. Those data points normally appear to be converged around a particular value.
Therefore, the range of the cluster in the scatter plot is between $40,000 and $60,000 for the data points between the years 8 to 12.
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Which of the following values of the correlation coefficient indicates the weakest relationship between two variables?
The correlation coefficient indicates the weakest relationship between two variables is 0.03. Therefore, the correct answer is option D.
The correlation coefficient is a measure of the strength of the linear relationship between two variables.
A correlation coefficient of 0.0 indicates no correlation—there is no linear relationship between the two variables.
A value of 0.03 indicates a very weak correlation, the weakest of the given options. Values closer to 1 or -1 indicate a stronger correlation.
Therefore, the correct answer is option D.
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"Your question is incomplete, probably the complete question/missing part is:"
Which of the following values of the correlation coefficient indicates the weakest relationship between two variables?
A) 0.42
B) -0.3
C) -0.87
D) 0.03
You Got to Leon and mango house and you decide to eat them, You Eat Mango 328 Times And You eat Leon 338 Times. How many times did you eat my friends leon and mango today? Dana Says That 60 Times And I Say That 666 Times.... Say Your answer Down below
A. 60 Times
B. 11 Times
C. 100 Times
D. 666 Times
PLEASE HOW YOUR WORK!
Answer:
The answer for the question is 666
Step-by-step explanation:
328+338=666
Answer:
666
Step-by-step explanation:
328+338=666
i ate ur friends 666 times
A total of 397 tickets were sold for the school play. They were either adult tickets or student tickets. There were 53 fewer student tickets sold than adult tickets. How many adult tickets were sold?