(1) Select the most appropriate answer (A, B, C or D)

1) A normal distribution has a mean of 55 and a variance of 14.44.

The probability of a score of 59 or more is approximately:

A. 0.15

B. 0.35

C. 0.50

D. 0.85

2) The essence of random sampling is that:

A. Every element of one definable subsection of the population is selected

B. Every nth member of the population is selected

C. Members of various strata are selected by the interviewers up to predetermined limits

D. Each element of the population has an equal chance of being chosen

3) The weights of elephants are normally distributed. The mean weight is 5,200 kg and the standard deviation is 430 kg. What is the probability of an elephant weighing more than 6,000 kg?

A. 0.0314

B. 0.2343

C. 0.4686

D. 0.9686