Question

QUESTION 31 

Which of the following is NOT a characteristic of the normal probability distribution? 

a. The distribution is symmetrical. 

b. The mean, median, and mode are equal. 

c. The standard deviation must be 1. 

d. The mean of the distribution can be negative, zero, or positive. 

QUESTION 32 

For a standard normal distribution, P(Z 0) is 

a. Zero 

b.one D 

c.0.5 

d.HOS 

Answer 1

1) The mean of standard normal distribution is always 0.

Answer :(d) The mean of the distribution can be negative , zero,or positive.

2) For a standard normal distribution

P(Z <= 0 ) = 0.5

Answer (c)

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