statistics

14. Assume a binomial distribution where n = 5 and T = .30. a. Refer lo Appendix A, and list the probabilities of a success for values of x from 0 to 5. b. Determine the mean and standard deviation of the distribution from the general defini- tions given in formulas (6-1) and (6-2). 15. A brokerage survey reports that 30 percent of individual investors have used a discount broker: that is, one which does not charge the full commissions. In a random sample of nine individuals, what is the probability: a. Exactly two of the sampled individuals have used a discount broker? b. Exactly four of them have used a discount broker? c. None of them have used a discount broker? 16. It is claimed that 95 percent of first class mail within the same city Is delivered within two days of the time of mailing. Six letters are randomly sent to different locations