Question 1

In a population with σ = 8,a score of X = 44 corresponds to a z-score of z = -0.50.What is the population mean?

Accepted Answer

A) μ = 36 
B) μ = 40 
C) μ = 48 
D) μ = 52 
A) μ = 36 
B) μ = 40 
C) μ = 48 
D) μ = 52

Question 2

A distribution with µ = 35 and σ = 8 is being standardized so that the new mean and standard deviation will be µ = 50 and σ = 10.In the new,standardized distribution,your score is X = 45.What was your score in the original distribution?

Accepted Answer

A) X = 30 
B) X = 31 
C) X = 39 
D) X = 45 
A) X = 30 
B) X = 31 
C) X = 39 
D) X = 45

Question 3

Transforming an entire distribution of scores into z-scores will not change the shape of the distribution.

Accepted Answer

A) True 
 B)False

Question 4

In a distribution with σ = 20,a score that is below the mean by 10 points will have a z-score of z = 0.50.

Accepted Answer

A) True 
 B)False

Question 5

For a sample with a standard deviation of s = 10,a score with a deviation of +5 will have a z-score of z = 0.50.

Accepted Answer

A) True 
 B)False

Question 6

A population has μ = 50.What value of σ would make X = 55 a central,representative score in the population?

Accepted Answer

A) σ = 1 
B) σ = 5 
C) σ = 10 
D) Cannot determine with the information given 
A) σ = 1 
B) σ = 5 
C) σ = 10 
D) Cannot determine with the information given

Question 7

A score that is 2 points higher than the sample mean has a z-score of z = 0.50,and a score of X = 44 has a z-score of -1.00.What is the sample mean?

Accepted Answer

A) M = 40 
B) M = 46 
C) M = 48 
D) M = 50 
A) M = 40 
B) M = 46 
C) M = 48 
D) M = 50

Question 8

A sample of n = 20 scores has a mean of M = 45 and a standard deviation of s = 8.In this sample,what is the z-score corresponding to X = 57?

Accepted Answer

A) z = 12/20 = 0.60 
B) z = 1.00 
C) z = 1.50 
D) z = 2.00 
A) z = 12/20 = 0.60 
B) z = 1.00 
C) z = 1.50 
D) z = 2.00

Question 9

Explain what is measured by the sign of a z-score and what is measured by its numerical value.

Accepted Answer

The sign tells whether the score is loca

Question 10

In a distribution with µ = 80 and σ = 20,a score of X = 95 corresponds to z = 1.50.

Accepted Answer

A) True 
 B)False

Question 11

A population of scores has µ = 80.In this population,a score of X = 86 corresponds to z = +2.00.What is the population standard deviation?

Accepted Answer

A) 2 
B) 3 
C) 6 
D) 12 
A) 2 
B) 3 
C) 6 
D) 12

Question 12

Under what circumstances is a score that is located 5 points above the mean a central value,relatively close to the mean?

Accepted Answer

A) When the population mean is much less than 5 
B) When the population mean is much greater than 5 
C) When the population standard deviation is much less than 5 
D) When the population standard deviation is much greater than 5 
A) When the population mean is much less than 5 
B) When the population mean is much greater than 5 
C) When the population standard deviation is much less than 5 
D) When the population standard deviation is much greater than 5

Question 13

For an exam with a mean of M = 74 and a standard deviation of s = 8,Mary has a score of X = 80,Bob's score corresponds to z = +1.50,and Sue's score is located above the mean by 10 points.If the students are placed in order from smallest score to largest score,what is the correct order?

Accepted Answer

A) Bob, Mary, Sue 
B) Sue, Bob, Mary 
C) Mary, Bob, Sue 
D) Mary, Sue, Bob 
A) Bob, Mary, Sue 
B) Sue, Bob, Mary 
C) Mary, Bob, Sue 
D) Mary, Sue, Bob

Question 14

A score that is 6 points above the mean corresponds to a z-score of z = +0.50.For this population,the standard deviation is σ = 3.

Accepted Answer

A) True 
 B)False

Question 15

For a sample with M = 50 and s = 8,z = 1.50 corresponds to X = 65.

Accepted Answer

A) True 
 B)False

Question 16

For a population with a standard deviation of σ = 6,what is the z-score corresponding to a score that is 12 points above the mean?

Accepted Answer

A) z = 1 
B) z = 2 
C) z = 6 
D) z = 12 
A) z = 1 
B) z = 2 
C) z = 6 
D) z = 12

Question 17

In a sample with s = 6,a score of X = 53 corresponds to z = -0.50.The mean for this sample is M = 56.

Accepted Answer

A) True 
 B)False

Question 18

For a sample of n = 30 scores,X = 45 corresponds to z = 1.50 and X = 40 corresponds to z = +1.00.What are the values for the sample mean and standard deviation?

Accepted Answer

A) M = 35 and s = 10 
B) M = 30 and s = 15 
C) M = 35 and s = 15 
D) M = 30 and s = 10 
A) M = 35 and s = 10 
B) M = 30 and s = 15 
C) M = 35 and s = 15 
D) M = 30 and s = 10

Question 19

For a population with µ = 40 and σ = 8,what is the X value corresponding to z = 1.50?

Accepted Answer

A) 44 
B) 50 
C) 52 
D) 58 
A) 44 
B) 50 
C) 52 
D) 58

Question 20

For a sample of n = 100 scores,X = 45 corresponds to z = 0.50 and X = 52 corresponds to z = +1.00.What are the values for the sample mean and standard deviation?

Accepted Answer

A) M = 31 and s = 7 
B) M = 31 and s = 14 
C) M = 38 and s = 7 
D) M = 38 and s = 14 
A) M = 31 and s = 7 
B) M = 31 and s = 14 
C) M = 38 and s = 7 
D) M = 38 and s = 14

In a population with σ = 8,a score of X = 44 corresponds to a z-score of z = -0.50.What is the population mean?

A distribution with µ = 35 and σ = 8 is being standardized so that the new mean and standard deviation will be µ = 50 and σ = 10.In the new,standardized distribution,your score is X = 45.What was your score in the original distribution?

Transforming an entire distribution of scores into z-scores will not change the shape of the distribution.

In a distribution with σ = 20,a score that is below the mean by 10 points will have a z-score of z = 0.50.

For a sample with a standard deviation of s = 10,a score with a deviation of +5 will have a z-score of z = 0.50.

A population has μ = 50.What value of σ would make X = 55 a central,representative score in the population?

A score that is 2 points higher than the sample mean has a z-score of z = 0.50,and a score of X = 44 has a z-score of -1.00.What is the sample mean?

A sample of n = 20 scores has a mean of M = 45 and a standard deviation of s = 8.In this sample,what is the z-score corresponding to X = 57?

Explain what is measured by the sign of a z-score and what is measured by its numerical value.

In a distribution with µ = 80 and σ = 20,a score of X = 95 corresponds to z = 1.50.

A population of scores has µ = 80.In this population,a score of X = 86 corresponds to z = +2.00.What is the population standard deviation?

Under what circumstances is a score that is located 5 points above the mean a central value,relatively close to the mean?

For an exam with a mean of M = 74 and a standard deviation of s = 8,Mary has a score of X = 80,Bob's score corresponds to z = +1.50,and Sue's score is located above the mean by 10 points.If the students are placed in order from smallest score to largest score,what is the correct order?

A score that is 6 points above the mean corresponds to a z-score of z = +0.50.For this population,the standard deviation is σ = 3.

For a sample with M = 50 and s = 8,z = 1.50 corresponds to X = 65.

For a population with a standard deviation of σ = 6,what is the z-score corresponding to a score that is 12 points above the mean?

In a sample with s = 6,a score of X = 53 corresponds to z = -0.50.The mean for this sample is M = 56.

For a sample of n = 30 scores,X = 45 corresponds to z = 1.50 and X = 40 corresponds to z = +1.00.What are the values for the sample mean and standard deviation?

For a population with µ = 40 and σ = 8,what is the X value corresponding to z = 1.50?

For a sample of n = 100 scores,X = 45 corresponds to z = 0.50 and X = 52 corresponds to z = +1.00.What are the values for the sample mean and standard deviation?

Introduction to Statistics.

Frequency Distributions.

Central Tendency.

Variability.

Probability.

Probability and Samples: The Distribution of Sample Means.

Introduction to Hypothesis Testing.

Introduction to the t Statistic

The t Test for Two Independent Samples

The t Test for Two Related Samples

Introduction to Analysis of Variance

Repeated-Measures and Two-Factor Analysis of Variance

Correlation and Regression.

The Chi-Square Statistic: Tests for Goodness of Fit and Independence

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Exam 5: z-Scores: Location of Scores and Standardized Distributions.

In a population with σ = 8,a score of X = 44 corresponds to a z-score of z = -0.50.What is the population mean?

A distribution with µ = 35 and σ = 8 is being standardized so that the new mean and standard deviation will be µ = 50 and σ = 10.In the new,standardized distribution,your score is X = 45.What was your score in the original distribution?

Transforming an entire distribution of scores into z-scores will not change the shape of the distribution.

In a distribution with σ = 20,a score that is below the mean by 10 points will have a z-score of z = 0.50.

For a sample with a standard deviation of s = 10,a score with a deviation of +5 will have a z-score of z = 0.50.

A population has μ = 50.What value of σ would make X = 55 a central,representative score in the population?

A score that is 2 points higher than the sample mean has a z-score of z = 0.50,and a score of X = 44 has a z-score of -1.00.What is the sample mean?

A sample of n = 20 scores has a mean of M = 45 and a standard deviation of s = 8.In this sample,what is the z-score corresponding to X = 57?

Explain what is measured by the sign of a z-score and what is measured by its numerical value.

In a distribution with µ = 80 and σ = 20,a score of X = 95 corresponds to z = 1.50.

A population of scores has µ = 80.In this population,a score of X = 86 corresponds to z = +2.00.What is the population standard deviation?

Under what circumstances is a score that is located 5 points above the mean a central value,relatively close to the mean?

For an exam with a mean of M = 74 and a standard deviation of s = 8,Mary has a score of X = 80,Bob's score corresponds to z = +1.50,and Sue's score is located above the mean by 10 points.If the students are placed in order from smallest score to largest score,what is the correct order?

A score that is 6 points above the mean corresponds to a z-score of z = +0.50.For this population,the standard deviation is σ = 3.

For a sample with M = 50 and s = 8,z = 1.50 corresponds to X = 65.

For a population with a standard deviation of σ = 6,what is the z-score corresponding to a score that is 12 points above the mean?

In a sample with s = 6,a score of X = 53 corresponds to z = -0.50.The mean for this sample is M = 56.

For a sample of n = 30 scores,X = 45 corresponds to z = 1.50 and X = 40 corresponds to z = +1.00.What are the values for the sample mean and standard deviation?

For a population with µ = 40 and σ = 8,what is the X value corresponding to z = 1.50?

For a sample of n = 100 scores,X = 45 corresponds to z = 0.50 and X = 52 corresponds to z = +1.00.What are the values for the sample mean and standard deviation?

Introduction to Statistics.

Frequency Distributions.

Central Tendency.

Variability.

Probability.

Probability and Samples: The Distribution of Sample Means.

Introduction to Hypothesis Testing.

Introduction to the t Statistic

The t Test for Two Independent Samples

The t Test for Two Related Samples

Introduction to Analysis of Variance

Repeated-Measures and Two-Factor Analysis of Variance

Correlation and Regression.

The Chi-Square Statistic: Tests for Goodness of Fit and Independence

Filters