Question 1

For a population with µ = 80 and σ = 6,what is the z-score corresponding to X = 68?

Accepted Answer

A) -0.50 
B) -2.00 
C) +2.00 
D) -12.00 
A) -0.50 
B) -2.00 
C) +2.00 
D) -12.00

Question 2

A population with µ = 85 and σ = 12 is transformed into z-scores.After the transformation,what is the standard deviation for the population of z-scores?

Accepted Answer

A) σ = 12 
B) σ = 1.00 
C) σ = 0 
D) Cannot be determined from the information given 
A) σ = 12 
B) σ = 1.00 
C) σ = 0 
D) Cannot be determined from the information given

Question 3

For a population with a mean of μ = 60 and a standard deviation of σ = 8,a score of X = 56 corresponds to z = -0.50.

Accepted Answer

A) True 
 B)False

Question 4

Last week Tim got a score of X = 54 on a math exam with µ = 60 and σ = 8.He also got X = 49 on an English exam with µ = 55 and σ = 3,and he got X = 31 on a psychology exam with µ = 37 and σ = 4.For which class should Tim expect the best grade?

Accepted Answer

A) Math 
B) English 
C) Psychology 
D) All 3 grades should be the same. 
A) Math 
B) English 
C) Psychology 
D) All 3 grades should be the same.

Question 5

What position in the distribution corresponds to a z-score of z = -1.00?

Accepted Answer

A) Below the mean by 1 point 
B) Below the mean by a distance equal to 1 standard deviation 
C) Above the mean by 1 point 
D) Above the mean by a distance equal to 1 standard deviation 
A) Below the mean by 1 point 
B) Below the mean by a distance equal to 1 standard deviation 
C) Above the mean by 1 point 
D) Above the mean by a distance equal to 1 standard deviation

Question 6

If an entire population of N = 20 scores is transformed into z-scores,the set of 20 z-scores will have ΣX = 0.

Accepted Answer

A) True 
 B)False

Question 7

In a sample of n = 40 scores,X = 31 corresponds to z = -1.50 and X = 39 corresponds to z = +0.50.The sample mean is M = 36.

Accepted Answer

A) True 
 B)False

Question 8

You have a score of X = 65 on an exam.Which set of parameters would give you the best grade on the exam?

Accepted Answer

A) μ = 60 and σ = 10 
B) μ = 60 and σ = 5 
C) μ = 70 and σ = 10 
D) μ = 70 and σ = 5 
A) μ = 60 and σ = 10 
B) μ = 60 and σ = 5 
C) μ = 70 and σ = 10 
D) μ = 70 and σ = 5

Question 9

For a population with a mean of μ = 80,any score greater than 80 will have a positive z-score.

Accepted Answer

A) True 
 B)False

Question 10

For a population with μ = 100 and σ = 20,what is the X value corresponding to z = -0.75?

Accepted Answer

A) 85 
B) 95 
C) 105 
D) 115 
A) 85 
B) 95 
C) 105 
D) 115

Question 11

In a sample with M = 40 and s = 8,what is the z-score corresponding to X = 38?

Accepted Answer

A) z = -0.25 
B) z = -0.50 
C) z = 0.25 
D) z = 0.50 
A) z = -0.25 
B) z = -0.50 
C) z = 0.25 
D) z = 0.50

Question 12

For a sample with a mean of M = 50 and a standard deviation of s = 10,a z-score of z = +2.00 corresponds to X = 70.

Accepted Answer

A) True 
 B)False

Question 13

For a distribution of scores,X = 40 corresponds to a z-score of z = -1.00,and X = 42 corresponds to a z-score of z = -0.50.What are the values for the mean and standard deviation for the distribution? (Hint: sketch a distribution and locate each of the z-score positions.)

Accepted Answer

The answer of For a distribution of scores,X = 40...

Question 14

In a population with a standard deviation of σ = 5,a score of X = 44 corresponds to a z-score of z = 2.00.What is the population mean?

Accepted Answer

A) 49 
B) 54 
C) 39 
D) 34 
A) 49 
B) 54 
C) 39 
D) 34

Question 15

For a sample with M = 50 and s = 12,what is the X value corresponding to z = -0.25?

Accepted Answer

A) 47 
B) 53 
C) 46 
D) 54 
A) 47 
B) 53 
C) 46 
D) 54

Question 16

A z-score of z = +1.00 always indicates a location exactly 1 standard deviation above the mean.

Accepted Answer

A) True 
 B)False

Question 17

What z-score corresponds to a score that is above the mean by 2 standard deviations?

Accepted Answer

A) +2 
B) +10 
C) +20 
D) Impossible to determine without knowing the value of the standard deviation 
A) +2 
B) +10 
C) +20 
D) Impossible to determine without knowing the value of the standard deviation

Question 18

On an exam with σ = 6,Tom's score of X = 54 corresponds to z = -1.00.The mean for the exam must be µ = 60.

Accepted Answer

A) True 
 B)False

Question 19

A population with ? = 41 and ? = 4 is standardized to create a new distribution with ? = 50 and ? = 10.In this transformation,a score of X = 39 from the original distribution will be transformed into a score of X = 55.

Accepted Answer

A) True 
 B)False

Question 20

Which of the following z-score values represents the location farthest from the mean?

Accepted Answer

A) z = +0.50 
B) z = +1.00 
C) z = -1.00 
D) z = -2.00 
A) z = +0.50 
B) z = +1.00 
C) z = -1.00 
D) z = -2.00

For a population with µ = 80 and σ = 6,what is the z-score corresponding to X = 68?

A population with µ = 85 and σ = 12 is transformed into z-scores.After the transformation,what is the standard deviation for the population of z-scores?

For a population with a mean of μ = 60 and a standard deviation of σ = 8,a score of X = 56 corresponds to z = -0.50.

Last week Tim got a score of X = 54 on a math exam with µ = 60 and σ = 8.He also got X = 49 on an English exam with µ = 55 and σ = 3,and he got X = 31 on a psychology exam with µ = 37 and σ = 4.For which class should Tim expect the best grade?

What position in the distribution corresponds to a z-score of z = -1.00?

If an entire population of N = 20 scores is transformed into z-scores,the set of 20 z-scores will have ΣX = 0.

In a sample of n = 40 scores,X = 31 corresponds to z = -1.50 and X = 39 corresponds to z = +0.50.The sample mean is M = 36.

You have a score of X = 65 on an exam.Which set of parameters would give you the best grade on the exam?

For a population with a mean of μ = 80,any score greater than 80 will have a positive z-score.

For a population with μ = 100 and σ = 20,what is the X value corresponding to z = -0.75?

In a sample with M = 40 and s = 8,what is the z-score corresponding to X = 38?

For a sample with a mean of M = 50 and a standard deviation of s = 10,a z-score of z = +2.00 corresponds to X = 70.

For a distribution of scores,X = 40 corresponds to a z-score of z = -1.00,and X = 42 corresponds to a z-score of z = -0.50.What are the values for the mean and standard deviation for the distribution? (Hint: sketch a distribution and locate each of the z-score positions.)

In a population with a standard deviation of σ = 5,a score of X = 44 corresponds to a z-score of z = 2.00.What is the population mean?

For a sample with M = 50 and s = 12,what is the X value corresponding to z = -0.25?

A z-score of z = +1.00 always indicates a location exactly 1 standard deviation above the mean.

What z-score corresponds to a score that is above the mean by 2 standard deviations?

On an exam with σ = 6,Tom's score of X = 54 corresponds to z = -1.00.The mean for the exam must be µ = 60.

A population with ? = 41 and ? = 4 is standardized to create a new distribution with ? = 50 and ? = 10.In this transformation,a score of X = 39 from the original distribution will be transformed into a score of X = 55.

Which of the following z-score values represents the location farthest from the mean?

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.

For a population with µ = 80 and σ = 6,what is the z-score corresponding to X = 68?

A population with µ = 85 and σ = 12 is transformed into z-scores.After the transformation,what is the standard deviation for the population of z-scores?

For a population with a mean of μ = 60 and a standard deviation of σ = 8,a score of X = 56 corresponds to z = -0.50.

Last week Tim got a score of X = 54 on a math exam with µ = 60 and σ = 8.He also got X = 49 on an English exam with µ = 55 and σ = 3,and he got X = 31 on a psychology exam with µ = 37 and σ = 4.For which class should Tim expect the best grade?

What position in the distribution corresponds to a z-score of z = -1.00?

If an entire population of N = 20 scores is transformed into z-scores,the set of 20 z-scores will have ΣX = 0.

In a sample of n = 40 scores,X = 31 corresponds to z = -1.50 and X = 39 corresponds to z = +0.50.The sample mean is M = 36.

You have a score of X = 65 on an exam.Which set of parameters would give you the best grade on the exam?

For a population with a mean of μ = 80,any score greater than 80 will have a positive z-score.

For a population with μ = 100 and σ = 20,what is the X value corresponding to z = -0.75?

In a sample with M = 40 and s = 8,what is the z-score corresponding to X = 38?

For a sample with a mean of M = 50 and a standard deviation of s = 10,a z-score of z = +2.00 corresponds to X = 70.

For a distribution of scores,X = 40 corresponds to a z-score of z = -1.00,and X = 42 corresponds to a z-score of z = -0.50.What are the values for the mean and standard deviation for the distribution? (Hint: sketch a distribution and locate each of the z-score positions.)

In a population with a standard deviation of σ = 5,a score of X = 44 corresponds to a z-score of z = 2.00.What is the population mean?

For a sample with M = 50 and s = 12,what is the X value corresponding to z = -0.25?

A z-score of z = +1.00 always indicates a location exactly 1 standard deviation above the mean.

What z-score corresponds to a score that is above the mean by 2 standard deviations?

On an exam with σ = 6,Tom's score of X = 54 corresponds to z = -1.00.The mean for the exam must be µ = 60.

A population with ? = 41 and ? = 4 is standardized to create a new distribution with ? = 50 and ? = 10.In this transformation,a score of X = 39 from the original distribution will be transformed into a score of X = 55.

Which of the following z-score values represents the location farthest from the mean?

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