Question 1

The mean for the population is 67 with a standard deviation of 8.78.Given a z score of 2.56, what is the raw score?

Accepted Answer

A)  89.48 
B)  75.78 
C)  87.88 
D)  69.56 
A)  89.48 
B)  75.78 
C)  87.88 
D)  69.56 A

Question 2

As sample size _____, the spread of distribution of means _____.

Accepted Answer

A)  increases; increases 
B)  decreases; stays the same 
C)  increases; decreases 
D)  decreases; decreases 
A)  increases; increases 
B)  decreases; stays the same 
C)  increases; decreases 
D)  decreases; decreases C

Question 3

The _____ curve forms a symmetrical and mathematically defined bell-shaped pattern.

Accepted Answer

A)  asymmetric 
B)  unstandardized 
C)  normal 
D)  nonlinear 
A)  asymmetric 
B)  unstandardized 
C)  normal 
D)  nonlinear C

Question 4

Jenna scored 40 on a standardized test of reading ability where the mean score is 50 and the standard deviation is 10.Based on this information, what is Jenna's z score?

Accepted Answer

A)  -2.0 
B)  2.0 
C)  1.0 
D)  -1.0 
A)  -2.0 
B)  2.0 
C)  1.0 
D)  -1.0

Question 5

A distribution of scores has a mean of 20.2 with a standard deviation of 0.89.Compare a score of 21.26 with a z score of 1.2.Which statement is correct?

Accepted Answer

A)  The score of 21.26 is greater. 
B)  The z score of 1.2 is greater, resulting in a raw score of 21.27. 
C)  The z score of 1.2 is lower, resulting in a raw score of 21.4. 
D)  The z score of 1.2 is greater, resulting in a raw score of 22.19. 
A)  The score of 21.26 is greater. 
B)  The z score of 1.2 is greater, resulting in a raw score of 21.27. 
C)  The z score of 1.2 is lower, resulting in a raw score of 21.4. 
D)  The z score of 1.2 is greater, resulting in a raw score of 22.19.

Question 6

Adam scored 60 on his final exam.His class's average score was 50, with a standard deviation of 10.How many standard deviations is Adam's score from the mean?

Accepted Answer

A)  1 standard deviation above the mean 
B)  1 standard deviation below the mean 
C)  2 standard deviations above the mean 
D)  2 standard deviations below the mean 
A)  1 standard deviation above the mean 
B)  1 standard deviation below the mean 
C)  2 standard deviations above the mean 
D)  2 standard deviations below the mean

Question 7

The second step in calculating a z score is expressing the obtained values in:

Accepted Answer

A)  standard deviation units. 
B)  linear form. 
C)  nonlinear form. 
D)  distribution of means. 
A)  standard deviation units. 
B)  linear form. 
C)  nonlinear form. 
D)  distribution of means.

Question 8

Two students from two different schools recently took a science test.The first student correctly answered 34 questions and the second student correctly answered 48 questions.What can be concluded from the two students' test scores?

Accepted Answer

A)  The second student is smarter than the first student. 
B)  The two students did equally well on the exam. 
C)  The two students cannot be compared because no standardization procedure was used to permit comparisons. 
D)  The two students cannot be compared because the scores did not form a linear curve. 
A)  The second student is smarter than the first student. 
B)  The two students did equally well on the exam. 
C)  The two students cannot be compared because no standardization procedure was used to permit comparisons. 
D)  The two students cannot be compared because the scores did not form a linear curve.

Question 9

A z score is a measure of:

Accepted Answer

A)  how far away from the mean a score is in terms of standard deviations. 
B)  how far away from the mean a score is in terms of inches. 
C)  the strength of the relationship between two variables. 
D)  the strength of the relationship between a score and its mean. 
A)  how far away from the mean a score is in terms of standard deviations. 
B)  how far away from the mean a score is in terms of inches. 
C)  the strength of the relationship between two variables. 
D)  the strength of the relationship between a score and its mean.

Question 10

The mean of the z distribution is 0.

Accepted Answer

A) True 
 B)False

Question 11

The z distribution always has a mean of _____.

Accepted Answer

A)  0 
B)  0.5 
C)  1 
D)  10 
A)  0 
B)  0.5 
C)  1 
D)  10

Question 12

If a distribution of scores has a mean of 60 and a standard deviation of 10, then a score of 50 has a z score that is _____ standard deviation(s) _____ the mean.

Accepted Answer

A)  2; below 
B)  1; above 
C)  1; below 
D)  2; above 
A)  2; below 
B)  1; above 
C)  1; below 
D)  2; above

Question 13

A negative z score will convert into a raw score that is below the mean of its distribution.

Accepted Answer

A) True 
 B)False

Question 14

In a normal standard curve, what percentile corresponds to a z score of 1.0?

Accepted Answer

A)  84 
B)  68 
C)  96 
D)  45 
A)  84 
B)  68 
C)  96 
D)  45

Question 15

The z distribution _____ has a standard deviation of _____.

Accepted Answer

A)  always; 0 
B)  sometimes; 0 
C)  always; 1 
D)  sometimes; 1 
A)  always; 0 
B)  sometimes; 0 
C)  always; 1 
D)  sometimes; 1

Question 16

A z score of -2.0 represents _____ a z score of 1.0.

Accepted Answer

A)  the same score as 
B)  a lower score than 
C)  a higher score than 
D)  a more standard score than 
A)  the same score as 
B)  a lower score than 
C)  a higher score than 
D)  a more standard score than

Question 17

According to the 2012-2013 annual report of the American Psychological Association's survey of faculty salaries in graduate departments of psychology, the average salary for a new (less than 3 years) full professor was $92,000 with a standard deviation of $32,845.What is the z score of a new full professor making $95,500?

Accepted Answer

A)  -0.62 
B)  -0.11 
C)  0.11 
D)  0.62 
A)  -0.62 
B)  -0.11 
C)  0.11 
D)  0.62

Question 18

Two students recently took algebra class tests.The students are at different schools but wanted to compare their performance.The first student scored 80 on the test.Her class average was 90 with a standard deviation of 10.The second student scored 70.Her class average was 50 with a standard deviation of 10.Which student did better?

Accepted Answer

A)  first student because she had a higher score 
B)  second student because she had an average score 
C)  first student because she performed better relative to her class 
D)  second student because she performed better relative to her class 
A)  first student because she had a higher score 
B)  second student because she had an average score 
C)  first student because she performed better relative to her class 
D)  second student because she performed better relative to her class

Question 19

The mean of the z distribution is 1.0.

Accepted Answer

A) True 
 B)False

Question 20

What percent of scores fall beyond 2 standard deviations away from the mean?

Accepted Answer

A)  28 
B)  14 
C)  4 
D)  2 
A)  28 
B)  14 
C)  4 
D)  2

The mean for the population is 67 with a standard deviation of 8.78.Given a z score of 2.56, what is the raw score?

As sample size _, the spread of distribution of means _.

The _____ curve forms a symmetrical and mathematically defined bell-shaped pattern.

Jenna scored 40 on a standardized test of reading ability where the mean score is 50 and the standard deviation is 10.Based on this information, what is Jenna's z score?

A distribution of scores has a mean of 20.2 with a standard deviation of 0.89.Compare a score of 21.26 with a z score of 1.2.Which statement is correct?

Adam scored 60 on his final exam.His class's average score was 50, with a standard deviation of 10.How many standard deviations is Adam's score from the mean?

The second step in calculating a z score is expressing the obtained values in:

Two students from two different schools recently took a science test.The first student correctly answered 34 questions and the second student correctly answered 48 questions.What can be concluded from the two students' test scores?

A z score is a measure of:

The mean of the z distribution is 0.

The z distribution always has a mean of _____.

If a distribution of scores has a mean of 60 and a standard deviation of 10, then a score of 50 has a z score that is _ standard deviation(s) _ the mean.

A negative z score will convert into a raw score that is below the mean of its distribution.

In a normal standard curve, what percentile corresponds to a z score of 1.0?

The z distribution _ has a standard deviation of _.

A z score of -2.0 represents _____ a z score of 1.0.

The mean of the z distribution is 1.0.

What percent of scores fall beyond 2 standard deviations away from the mean?

An Introduction to Statistics and Research Design

Frequency Distributions

Visual Displays of Data

Central Tendency and Variability

Sampling and Probability

Hypothesis Testing With Z Tests

Confidence Intervals, Effect Size, and Statistical Power

The Single-Sample T Test

The Paired-Samples T Test

The Independent-Samples T Test

One-Way Between-Groups Anova

One-Way Within-Groups Anova

Two-Way Between-Groups Anova

Correlation

Regression

Chi-Square Tess

Choosing and Reporting Statistics

Filters

Exam 6: The Normal Curve, Standardization and Z Scores

The mean for the population is 67 with a standard deviation of 8.78.Given a z score of 2.56, what is the raw score?

As sample size _____, the spread of distribution of means _____.

The _____ curve forms a symmetrical and mathematically defined bell-shaped pattern.

Jenna scored 40 on a standardized test of reading ability where the mean score is 50 and the standard deviation is 10.Based on this information, what is Jenna's z score?

A distribution of scores has a mean of 20.2 with a standard deviation of 0.89.Compare a score of 21.26 with a z score of 1.2.Which statement is correct?

Adam scored 60 on his final exam.His class's average score was 50, with a standard deviation of 10.How many standard deviations is Adam's score from the mean?

The second step in calculating a z score is expressing the obtained values in:

Two students from two different schools recently took a science test.The first student correctly answered 34 questions and the second student correctly answered 48 questions.What can be concluded from the two students' test scores?

A z score is a measure of:

The mean of the z distribution is 0.

The z distribution always has a mean of _____.

If a distribution of scores has a mean of 60 and a standard deviation of 10, then a score of 50 has a z score that is _____ standard deviation(s) _____ the mean.

A negative z score will convert into a raw score that is below the mean of its distribution.

In a normal standard curve, what percentile corresponds to a z score of 1.0?

The z distribution _____ has a standard deviation of _____.

A z score of -2.0 represents _____ a z score of 1.0.

The mean of the z distribution is 1.0.

What percent of scores fall beyond 2 standard deviations away from the mean?

An Introduction to Statistics and Research Design

Frequency Distributions

Visual Displays of Data

Central Tendency and Variability

Sampling and Probability

Hypothesis Testing With Z Tests

Confidence Intervals, Effect Size, and Statistical Power

The Single-Sample T Test

The Paired-Samples T Test

The Independent-Samples T Test

One-Way Between-Groups Anova

One-Way Within-Groups Anova

Two-Way Between-Groups Anova

Correlation

Regression

Chi-Square Tess

Choosing and Reporting Statistics

Filters

As sample size _, the spread of distribution of means _.

If a distribution of scores has a mean of 60 and a standard deviation of 10, then a score of 50 has a z score that is _ standard deviation(s) _ the mean.

The z distribution _ has a standard deviation of _.