QuestionQuestion 10 out of 5 points

Question 1

0 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

How much would your income be if its z score value was 2.58?

Question 3

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 4

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 5

0 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 6

0 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 2.02 is _________.

Question 7

0 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 between 300 and 400 is _________.

Question 8

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 standard deviation of the distribution is _________.

Question 9

5 out of 5 points

S(z – μz) equals _________.

Question 10

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 11

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.

The percentage of scores that lie between $9.00 and $10.00 is _________.

Question 12

0 out of 5 points

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

Question 13

0 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 below a score of 83.8?

Question 14

0 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 15

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 16

0 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 17

5 out of 5 points

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

Question 18

0 out of 5 points

Assuming the z scores are normally distributed, what is the percentile rank of a z score of -0.

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