multiple choice

A distribution has a standard deviation = 10. Find the z score for a location in the distribution that is above the mean by 5 points.

z = 10

z = 0.5

z = 2

z = 5

A distribution has a standard deviation delta = 10. Find the z score for a location in the distribution that is below the mean by 20 points.

z = 2

z = 20

z = - 0.5

z = - 2

For a distribution with a standard deviation of delta = 20, describe the location of a z score of z = +2.00 in terms of its position relative to the mean.

z = +2.00 is located 2 points above the mean

z = +2.00 is located 20 points above the mean

z = +2.00 is located 40 points above the mean

z = +2.00 is located 10 points above the mean

For a distribution with a standard deviation of = 20, describe the location of a z score of z = - 0.25 in terms of its position relative to the mean.

z = - 0.25 is located 5 points above the mean

z = - 0.25 is located 20 points below the mean

z = - 0.25 is located 25 points below the mean

z = - 0.25 is located 5 points below the mean

For a population with mu = 60 and sigma = 12, find the z score for an X value of X = 75.

z = 1.5

z = 1.25

z = - 1.25

z = 15

For a population with mu = 60 and sigma = 12, find the z score for an X value of X = 51.

z = - 0.75

z = 1.50

z = 0.90

z = - 1.50

For a population with mu = 60 and sigma = 12, find the X value that corresponds to a z score of z = 1.00

X = 60

X = 54

x = 45

x = 72

For a population with mu = 60 and sigma = 12, find the X value that corresponds to a z score of z = - 2.50

X = 30

X = 90

X = 72

X = 63

Find the z score corresponding to a score of X = 45 for a distribution that has mu = 40 and sigma = 20.

z = 0.50

z = 2.50

z = 0.25

z = - 0.25

Find the z score corresponding to a score of X = 45 for a distribution that has mu = 40 and sigma = 5.

z = 1.00

z = 5.00

z = 2.50

z = 0.50

A score that is 6 points below the mean corresponds to a z-score of z = - 2.00. What is the population standard deviation?

6

3

-12

12

For a population with a standard deviation of sigma = 12, a score of X = 44 corresponds to z = - 0.50. What is the population mean?

6

32

-12

50

A sample consists of the following n = 7 scores: 5, 0, 4, 5,1, 2, and 4.

Compute the mean for the sample.

21

2

7

3

A sample consists of the following n = 7 scores: 5, 0, 4, 5,1, 2, and 4.

Compute the standard deviation for the sample.

3

2

4

21

A sample consists of the following n = 7 scores: 5, 0, 4, 5,1, 2, and 4.

Find the z score for the score of X = 5 in the sample.

z = 3.00

z = 2.00

z = 1.00

z = 21