For each problem, select the best response.

(a) Which of these variables is least likely to have a Normal distribution?

A. Lengths of 50 newly hatched pythons.

B. Income per person for 150 different countries.

C. Heights of 100 white pine trees in a forest.

D. None of the above.

(b) The scores of adults on an RD test is approximately Normal with mean 100 and standard deviation 15. Corinne scores 118 on such test. Her z-score is about

A. 1.2

B. 0.67

C. 7.87

D. 18

E. None of the above.

(c) To completely specify the shape of a Normal distribution, you must give

A. the mean and the standard deviation.

B. the median and the standard deviation.

C. The five-number summary.

D. The mean and the median.

E. All of the above.