PSY-3301 Chapter 5 MC Quiz (Set 3)

Question 1

5 out of 5 points

A testing bureau reports that the mean for the population of Graduate Record Exam (GRE) scores is 500 with a standard deviation of 90. The scores are normally distributed.

The raw score that lies at the 90th percentile is _________.

Question 2

5 out of 5 points

Table A in your textbook has no negative z values, this means _________.

Question 3

5 out of 5 points

A stockbroker has kept a daily record of the value of a particular stock over the years and finds that prices of the stock form a normal distribution with a mean of $8.52 with a standard deviation of $2.38.

What percentage of the distribution lies between $5 and $11?

Question 4

5 out of 5 points

The standard deviation of the z distribution equals _________.

Question 5

5 out of 5 points

A distribution has a mean of 60.0 and a standard deviation of 4.3. The raw score corresponding to a z score of 0.00 is _________.

Question 6

5 out of 5 points

A standardized test has a mean of 88 and a standard deviation of 12. What is the score at the 90th percentile? Assume a normal distribution.

Question 7

5 out of 5 points

Given the following set of sample raw scores, X: 1, 3, 4, 6, 8. What is the z transformed value for the raw score of 3?

Question 8

5 out of 5 points

If a population of scores is normally distributed, has a mean of 45 and a standard deviation of 6, the most extreme 5% of the scores lie beyond the score(s) of _________.

Question 9

5 out of 5 points

If a distribution of raw scores is negatively skewed, transforming the raw scores into z scores will result in a _________ distribution.

Question 10

5 out of 5 points

All bell-shaped curves _________.

Question 11

5 out of 5 points

A stockbroker has kept a daily record of the value of a particular stock over the years and finds that prices of the stock form a normal distribution with a mean of $8.52 with a standard deviation of $2.38.

The stock price beyond which 0.05 of the distribution falls is _________.

Question 12

5 out of 5 points

Assuming the z scores are normally distributed, what is the percentile rank of a z score of -0.47?

Question 13

5 out of 5 points

If you transformed a set of raw scores, and then added 15 to each z score, the resulting scores _________.

Question 14

5 out of 5 points

A stockbroker has kept a daily record of the value of a particular stock over the years and finds that prices of the stock form a normal distribution with a mean of $8.52 with a standard deviation of $2.38.

What percentage of the distribution lies below $7.42.

Question 15

5 out of 5 points

An economics test was given and the following sample scores were recorded:

Individual

A

B

C

D

E

F

G

H

I

J

Score

12

12

7

10

9

12

13

8

9

8

The z score for individual E is _________.

Question 16

5 out of 5 points

A testing service has 1000 raw scores. It wants to transform the distribution so that the mean = 10 and the standard deviation = 1. To do so, _________.

Question 17

5 out of 5 points

The mean of the z distribution equals _________.

Question 18

5 out of 5 points

On a test with a population mean of 75 and standard deviation equal to 16, if the scores are normally distributed, what percentage of scores fall between 70 and 80?

Question 19

5 out of 5 points

An economics test was given and the following sample scores were recorded:

Individual

A

B

C

D

E

F

G

H

I

J

Score

12

12

7

10

9

12

13

8

9

8

The z score for individual D is _________.

Question 20

5 out of 5 points

A distribution has a mean of 60.0 and a standard deviation of 4.3. The raw score corresponding to a z score of -1.51 is _________.