1. Suppose you have a binomial distribution exercise with n = 20 and p = 0.5, you want to know what is the probability of obtaining ten successes. Using the normal approximation to the binomial, the result is calculated to be ...

Select one:

A. = 0.5438-0.4602

B. = 0.6700-0.3300

C. = 0.7486-0.2514

D. = 0.5871-0.4129

2. Select the cases in which, according to the value of the parameters, the normal distribution can be used to approximate the binomial distribution.

Select one or more than one:

a. q = 0.5 and n> 10

b. q = 0.3 and n> 16

c. q = 0.9 and n> 50

d. q = 0.8 and n> 5

3. A correction factor is required when approximating the binomial distribution through the normal distribution because ....

Select one:

a. fits the area below the normal to the histogram of the binomial

b. 'n' is supposed to be big and 'p' small

c. both distributions are required to have the same variance

d. a discrete variable is approximated by a continuous variable