Question 1

In a normal distribution the z score for the mean equals _________.

Accepted Answer

A)  0 
B)  the z score for the median 
C)  the z score for the mode 
D)  all of these

Question 2

To do a z transformation, one must know only the population mean and the value of the raw score to be transformed.

Accepted Answer

A) True 
 B)False

Question 3

In a population survey of patients in a rehabilitation hospital, the mean length of stay in the hospital was 12.0 weeks with a standard deviation equal to 1.0 week. The distribution was normally distributed. 
 What is the percentile rank of a stay of 11.3 weeks?

Accepted Answer

The answer of In a population survey of patients in...

Question 4

The area beyond a z score of -1.12 is the same as the area beyond a z score of 1.12.

Accepted Answer

A) True 
 B)False

Question 5

The normal curve is a symmetric, bell-shaped curve.

Accepted Answer

A) True 
 B)False

Exam 5: The Normal Curve and Standard Scores

In a normal distribution the z score for the mean equals _________.

To do a z transformation, one must know only the population mean and the value of the raw score to be transformed.

In a population survey of patients in a rehabilitation hospital, the mean length of stay in the hospital was 12.0 weeks with a standard deviation equal to 1.0 week. The distribution was normally distributed. What is the percentile rank of a stay of 11.3 weeks?

The area beyond a z score of -1.12 is the same as the area beyond a z score of 1.12.

The normal curve is a symmetric, bell-shaped curve.