Question 1

If a Z score is 0,then the value of the corresponding raw score would be

Accepted Answer

A) 0. 
B) the same as the mean of the empirical distribution. 
C) the same as the standard deviation of the empirical distribution. 
D) probably a negative number. 
A) 0. 
B) the same as the mean of the empirical distribution. 
C) the same as the standard deviation of the empirical distribution. 
D) probably a negative number. B

Question 2

A defining characteristic of the normal curve is that it is

Accepted Answer

A) theoretical. 
B) positively skewed. 
C) negatively skewed. 
D) perfectly nonsymmetrical. 
A) theoretical. 
B) positively skewed. 
C) negatively skewed. 
D) perfectly nonsymmetrical. A

Question 3

A sample of university students has an average GPA of 2.78 with a standard deviation of 0.45.If GPA is normally distributed,what percentage of the students has GPAs
 $\begin{array}{|l|l|l|l|l|}
\hline & & Z \text { score } && \text { Area } \
\hline \text { a. } & \text { less than } 2.30 ? & & & \
\hline \text { b. } & \text { Less than } 2.00 ? & & & \
\hline \text { c. } & \text { more than } 2.00 ? & & & \
\hline \text { d. } & \text { more than } 3.00 ? & & & \
\hline \text { e. } & \text { between } 2.50 \text { and } 3.50 ? & & & \
\hline \text { f. } & \text { between } 2.00 \text { and } 2.50 ? & & & \
\hline & & & & \

\end{array}$

Accepted Answer

$\begin{array}{|l|l|l|}
\hline & Z \text { score } & \text { Area } \
\hline \text { a. } & -1.07 & 14.23 \% \
\hline \text { b. } & -1.73 & 4.18 \% \
\hline \text { c. } & -1.73 & 95.82 \% \
\hline \text { d. } & 0.49 & 31.21 \% \
\hline \text { e. } & -0.62 \& 1.60 & 67.76 \% \
\hline \text { f. } & -1.73 \&-0.62 & 22.58 \% \
\hline & & \

\end{array}$

Question 4

A Z score of +1.00 indicates a score that lies

Accepted Answer

A) one standard deviation unit to the right of the mean. 
B) one standard deviation unit to the left of the mean. 
C) 1/2 of one standard deviation unit on each side of the mean. 
D) any of the above are possible 
A) one standard deviation unit to the right of the mean. 
B) one standard deviation unit to the left of the mean. 
C) 1/2 of one standard deviation unit on each side of the mean. 
D) any of the above are possible

Question 5

To obtain the area below a positive Z score or above a negative Z score you would

Accepted Answer

A) subtract the value of the Z score from the mean. 
B) subtract the area in the "Area Beyond Z" column of the Z score table from 50%. 
C) add the value of the Z score to the area beyond the mean. 
D) add the area between the Z score and the mean to 50%. 
A) subtract the value of the Z score from the mean. 
B) subtract the area in the "Area Beyond Z" column of the Z score table from 50%. 
C) add the value of the Z score to the area beyond the mean. 
D) add the area between the Z score and the mean to 50%.

Question 6

To estimate probabilities,set up a fraction with the number of ____ in the numerator and the number of ____ in the denominator

Accepted Answer

A) successes,failures 
B) possible outcomes,successes 
C) failures,successes 
D) successes,possible outcomes 
A) successes,failures 
B) possible outcomes,successes 
C) failures,successes 
D) successes,possible outcomes

Question 7

The Z scores of two test scores are -1.17 and +2.38.To find the total area beyond these two scores,

Accepted Answer

A) add the column b areas together. 
B) subtract each score from the mean and divide the result by the standard deviation. 
C) add the column b area to the column c area. 
D) add the column c areas. 
A) add the column b areas together. 
B) subtract each score from the mean and divide the result by the standard deviation. 
C) add the column b area to the column c area. 
D) add the column c areas.

Question 8

To find the area above a positive Z score or below a negative Z score you would

Accepted Answer

A) subtract the value of the Z score from the mean. 
B) use the "Area Beyond Z" column of the Z score table. 
C) add the value of the Z score to the area beyond the mean. 
D) add the area between the Z score and the mean to 100%. 
A) subtract the value of the Z score from the mean. 
B) use the "Area Beyond Z" column of the Z score table. 
C) add the value of the Z score to the area beyond the mean. 
D) add the area between the Z score and the mean to 100%.

Question 9

On all normal curves the area between the mean and$\pm$2 standard deviations will be

Accepted Answer

A) about 34% of the total areA. 
B) about 95% of the total area. 
C) less than 50% of the total area. 
D) about 68% of the total area. 
A) about 34% of the total areA. 
B) about 95% of the total area. 
C) less than 50% of the total area. 
D) about 68% of the total area.

Question 10

A social researcher has constructed a measure of racial prejudice and obtained a distribution of scores on this measure from a randomly selected sample of public office holders.The scores were normally distributed with a mean of 45 and a standard deviation of 7.What is the probability that a randomly selected case from the sample will have a score less than 38?

Accepted Answer

A) 0.4526 
B) 0.5018 
C) 0.5200 
D) 0.1587 
A) 0.4526 
B) 0.5018 
C) 0.5200 
D) 0.1587

Question 11

The standardized normal distribution (or Z distribution)has

Accepted Answer

A) a mean of 0 and a standard deviation of 1. 
B) a mean of 1 and a standard deviation of 0. 
C) a mean equal to the average of the scores and a standard deviation equal to the mean. 
D) a mean of 1 and a standard deviation of 1. 
A) a mean of 0 and a standard deviation of 1. 
B) a mean of 1 and a standard deviation of 0. 
C) a mean equal to the average of the scores and a standard deviation equal to the mean. 
D) a mean of 1 and a standard deviation of 1.

Question 12

The area between two negative Z scores can be found by

Accepted Answer

A) adding the Z scores and finding the area below the total Z score. 
B) subtracting the Z scores and finding the total area above the total Z score. 
C) finding the area between each Z score and the mean and subtracting the smaller area from the larger. 
D) finding the area between each Z score and the mean and adding the areas. 
A) adding the Z scores and finding the area below the total Z score. 
B) subtracting the Z scores and finding the total area above the total Z score. 
C) finding the area between each Z score and the mean and subtracting the smaller area from the larger. 
D) finding the area between each Z score and the mean and adding the areas.

Question 13

As used in the social sciences,probabilities are a type of ____ which can vary from ____.

Accepted Answer

A) percentage,0 to 1 
B) fraction,0 to 100 
C) proportion,0.00 to 1.00 
D) Z score,0 to infinity 
A) percentage,0 to 1 
B) fraction,0 to 100 
C) proportion,0.00 to 1.00 
D) Z score,0 to infinity

Question 14

If a case is randomly selected from a normal distribution,the score of the case will most likely be

Accepted Answer

A) equal to the mean in value. 
B) close to the mean in value. 
C) at least 1 standard deviation above the mean. 
D) at least 1 standard deviation below the mean. 
A) equal to the mean in value. 
B) close to the mean in value. 
C) at least 1 standard deviation above the mean. 
D) at least 1 standard deviation below the mean.

Question 15

The tails of the theoretical normal curve

Accepted Answer

A) intersect with the horizontal axis between the 4th and 5th standard deviation. 
B) intersect with the horizontal axis beyond the 5th standard deviation. 
C) never touch the horizontal axis. 
D) maintain the same distance above the horizontal axis beyond the 3rd standard deviation. 
A) intersect with the horizontal axis between the 4th and 5th standard deviation. 
B) intersect with the horizontal axis beyond the 5th standard deviation. 
C) never touch the horizontal axis. 
D) maintain the same distance above the horizontal axis beyond the 3rd standard deviation.

Question 16

The area between a negative Z score and a positive Z score can be found by

Accepted Answer

A) subtracting the Z scores from each other. 
B) subtracting each Z score from the mean and adding the results. 
C) adding the Z scores and finding the area in the Z score table for the summed Z scores. 
D) adding the areas between each Z score and the mean. 
A) subtracting the Z scores from each other. 
B) subtracting each Z score from the mean and adding the results. 
C) adding the Z scores and finding the area in the Z score table for the summed Z scores. 
D) adding the areas between each Z score and the mean.

Question 17

Converting scores into Z scores standardizes the original distribution to units of the

Accepted Answer

A) median. 
B) standard deviation. 
C) mean. 
D) percentage. 
A) median. 
B) standard deviation. 
C) mean. 
D) percentage.

Question 18

The mean score on a final chemistry exam was 75,and the standard deviation of the scores was 5.If the distribution is normal and your score was 70,what percentage of the scores was lower than yours?

Accepted Answer

A) 15.87% 
B) 30.00% 
C) 34.13% 
D) 50.00% 
A) 15.87% 
B) 30.00% 
C) 34.13% 
D) 50.00%

Question 19

What is the probability that a randomly selected case from the sample in the previous question would have a score of 52 or more?

Accepted Answer

A) 0.7500 
B) 0.6826 
C) 0.3413 
D) 0.1587 
A) 0.7500 
B) 0.6826 
C) 0.3413 
D) 0.1587

Question 20

The area between the mean and a Z score of +1.50 is 43.32%.This score is less than ____ of the scores in the distribution.

Accepted Answer

A) 43.32% 
B) 6.68% 
C) 3.32% 
D) 93.32% 
A) 43.32% 
B) 6.68% 
C) 3.32% 
D) 93.32%

If a Z score is 0,then the value of the corresponding raw score would be

A defining characteristic of the normal curve is that it is

A Z score of +1.00 indicates a score that lies

To obtain the area below a positive Z score or above a negative Z score you would

To estimate probabilities,set up a fraction with the number of in the numerator and the number of in the denominator

The Z scores of two test scores are -1.17 and +2.38.To find the total area beyond these two scores,

To find the area above a positive Z score or below a negative Z score you would

On all normal curves the area between the mean and $\pm$ 2 standard deviations will be

The standardized normal distribution (or Z distribution)has

The area between two negative Z scores can be found by

As used in the social sciences,probabilities are a type of which can vary from .

If a case is randomly selected from a normal distribution,the score of the case will most likely be

The tails of the theoretical normal curve

The area between a negative Z score and a positive Z score can be found by

Converting scores into Z scores standardizes the original distribution to units of the

The mean score on a final chemistry exam was 75,and the standard deviation of the scores was 5.If the distribution is normal and your score was 70,what percentage of the scores was lower than yours?

What is the probability that a randomly selected case from the sample in the previous question would have a score of 52 or more?

The area between the mean and a Z score of +1.50 is 43.32%.This score is less than ____ of the scores in the distribution.

Introduction

Basic Descriptive Statistics: Percentages, Ratios and Rates, Tables, Charts and Graphs

Measures of Central Tendency

Measures of Dispersion

Introduction to Inferential Statistics: Sampling and the Sampling Distribution

Estimation Procedures

Hypothesis Testing I: the One-Sample Case

Hypothesis Testing II: the Two-Sample Case

Hypothesis Testing III: the Analysis of Variance

Hypothesis Testing Iv: Chi Square

Bivariate Association: Introduction and Basic Concepts

Association Between Variables Measured at the Nominal Level

Association Between Variables Measured at the Ordinal Level

Association Between Variables Measured at the Interval-Ratio Level

Elaborating Bivariate Tables

Partial Correlation and Multiple Regression and Correlation

Filters

Exam 5: The Normal Curve

If a Z score is 0,then the value of the corresponding raw score would be

A defining characteristic of the normal curve is that it is

A Z score of +1.00 indicates a score that lies

To obtain the area below a positive Z score or above a negative Z score you would

To estimate probabilities,set up a fraction with the number of ____ in the numerator and the number of ____ in the denominator

The Z scores of two test scores are -1.17 and +2.38.To find the total area beyond these two scores,

To find the area above a positive Z score or below a negative Z score you would

On all normal curves the area between the mean and ±\pm± 2 standard deviations will be

The standardized normal distribution (or Z distribution)has

The area between two negative Z scores can be found by

As used in the social sciences,probabilities are a type of ____ which can vary from ____.

If a case is randomly selected from a normal distribution,the score of the case will most likely be

The tails of the theoretical normal curve

The area between a negative Z score and a positive Z score can be found by

Converting scores into Z scores standardizes the original distribution to units of the

The mean score on a final chemistry exam was 75,and the standard deviation of the scores was 5.If the distribution is normal and your score was 70,what percentage of the scores was lower than yours?

What is the probability that a randomly selected case from the sample in the previous question would have a score of 52 or more?

The area between the mean and a Z score of +1.50 is 43.32%.This score is less than ____ of the scores in the distribution.

Introduction

Basic Descriptive Statistics: Percentages, Ratios and Rates, Tables, Charts and Graphs

Measures of Central Tendency

Measures of Dispersion

Introduction to Inferential Statistics: Sampling and the Sampling Distribution

Estimation Procedures

Hypothesis Testing I: the One-Sample Case

Hypothesis Testing II: the Two-Sample Case

Hypothesis Testing III: the Analysis of Variance

Hypothesis Testing Iv: Chi Square

Bivariate Association: Introduction and Basic Concepts

Association Between Variables Measured at the Nominal Level

Association Between Variables Measured at the Ordinal Level

Association Between Variables Measured at the Interval-Ratio Level

Elaborating Bivariate Tables

Partial Correlation and Multiple Regression and Correlation

Filters

To estimate probabilities,set up a fraction with the number of in the numerator and the number of in the denominator

On all normal curves the area between the mean and $\pm$ 2 standard deviations will be

As used in the social sciences,probabilities are a type of which can vary from .