A testing service has 1000 raw scores

Question 1

0 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 2

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 3

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 4

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 5

5 out of 5 points

The standard deviation of the z distribution equals _________.

Question 6

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 below a score of 83.8?

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

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 9

0 out of 5 points

Would you rather have an income (assume a normal distribution and you are greedy) _________.

Question 10

5 out of 5 points

S(z – μz) equals _________.

 

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 percentile rank of a price of $13.87 is _________.

Question 12

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 between 300 and 400 is _________.

Question 13

5 out of 5 points

A distribution of raw scores is positively skewed. You want to transform it so that it is normally distributed. Your friend, who fancies herself a statistics whiz, advises you to transform the raw scores to z scores; that the z scores will be normally distributed. You should _________.

Question 14

5 out of 5 points

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

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 mean of the distribution is _________.

Question 16

5 out of 5 points

The normal curve is _________.

Question 17

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 18

5 out of 5 points

Which of the following z scores represent(s) the most extreme value in a distribution of scores assuming they are normally distributed?

Question 19

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 20

5 out of 5 points

You have just received your psychology exam grade and you did better than the mean of the exam scores. If so, the z transformed value of your grade must