4. In Chapter 2, we looked at the shapes of distributions. Review the concepts of skewness and symmetry; then categorize the following distributions as to skewness or symmetry:

(a) A binomial distribution with n 5 11 trials and p 5 0.50

(b) A binomial distribution with n 5 11 trials and p 5 0.10

(c) A binomial distribution with n 5 11 trials and p 5 0.90 In general, does it seem true that binomial probability distributions in which the probability of success is close to 0 are skewed right, whereas those with probability of success close to 1 are skewed left?