STA 3032 Lecture 10: 4.3 Normal Distribution

The following graph is a normal probability plot for the amount of rainfall (in acre-feet) obtained from 26 randomly selected clouds that were seeded with silver oxide. Which of the following statements about the shape of the rainfall distribution is true?

(a) The distribution is Normal.

(b) The distribution is approximately Normal.

(c) The distribution is roughly symmetric.

(d) The distribution has no potential outliers.

(e) The distribution is skewed.

As the sample size becomes larger, the sampling distribution of the sample mean approaches

a. binomial distribution

b. Poisson distribution

c. normal distribution

d. chi-square distribution

The normal probability distribution is

a.   a bell-shaped distribution.  

b.   a continuous distribution.

c.   symmetric.  

d.   all of the above.