Question 1

Which of the following is NOT a property of Standard Normal Distribution

Accepted Answer

The standard deviation is equal to 0 and mean is equal to 1.

Answer

The total area under the standard normal curve is equal to 1.

Answer

The mean, median and mode are equal.

Answer

The tails of a standard normal curve are asymptotic relative to the horizontal line.

Question 2

In a normal distribution, changing the mean shifts the distribution to

Accepted Answer

left or right

Answer

up or down

Answer

steep or flat slope

Answer

not shifting at all

Question 3

Which of the following is at the center or peak of the normal distribution?

Accepted Answer

Mean

Answer

Probability

Answer

Standard Deviation

Answer

Variance

Question 4

Using the z-table, find the area that corresponds to z = - 2.18.

Accepted Answer

0.4854

Answer

0.4857

Answer

0.4850

Answer

Cannot be determined

Question 5

Using the z-table, find the area that corresponds to z = 0.56.

Accepted Answer

0.2123

Answer

0.2190

Answer

0.2157

Answer

0.2088

Question 6

Using the z-table, find the area that corresponds to z = 2.03.

Accepted Answer

0.4788

Answer

0.4783

Answer

0.4793

Answer

0.4778

Question 7

Using the z-table, find the area that corresponds to z = - 1.17.

Accepted Answer

0.3790

Answer

0.3810

Answer

0.3770

Answer

Cannot be determined

Question 8

The random variable X is best described by a normal distribution with µ= 30 and σ = 6.  Find the z-score that corresponds to X = 21.

Accepted Answer

z = - 1.50

Answer

z = 0.50

Answer

z = - 0.50

Answer

z = 1.50

Question 9

The random variable X is best described by a normal distribution with µ= 30 and σ = 6.  Find the z-score that corresponds to X = 42.

Accepted Answer

z = 2.00

Answer

z = 1.20

Answer

z = - 2.00

Answer

z = - 1.20

Question 10

Given: µ = 30, σ = 4.50. What is the raw score when z = 1.25?

Accepted Answer

X = 35.63

Answer

X = - 6.39

Answer

X = - 24.38

Answer

X = 136.25

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