PSY-3301 Chapter 5 MC Quiz (Set 7)

Question 1

5 out of 5 points

The z score corresponding to a raw score of 120 is _________.

Question 2

0 out of 5 points

The mean of the z distribution equals _________.

Question 3

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 is the percentile rank of a score of 56?

Question 4

0 out of 5 points

S(z – μz) equals _________.

Question 5

5 out of 5 points

The normal curve is _________.

Question 6

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 mean of the distribution is _________.

Question 7

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 8

5 out of 5 points

Makaela took a Spanish exam; her grade was 79. The distribution was normally shaped with = 70 and s = 12. Juan took a History exam; his grade was 86. The distribution was normally shaped with = 80 and s = 8. Which did better on their exam relative to those taking the exam?

Question 9

5 out of 5 points

All bell-shaped curves _________.

Question 10

0 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 11

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 12

0 out of 5 points

The standard deviation of the z distribution equals _________.

Question 13

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 proportion of scores that lie between 460 and 600 is _________.

Question 14

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 15

5 out of 5 points

In a normal curve, the inflection points occur at _________.

Question 16

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 _________.

Question 17

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 18

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 19

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 20

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 percentile rank of a price of $13.87 is _________.