Scores for a civil service exam are normally distributed with a mean of 75 and a standard deviation of 6.5. Between what two scores do the middle 50% of the data lie?

Given a binomial distribution variable with n=20 and p=0.60 find the following possibilities using the binomial table a) p(x < 13) b) p x > 15) c) p(x = 17) d) p(11 < x < 14) e) p(11 < x < 14)