For a binomial experiment with r successes out of n trials, how do we find the point estimate, p with hat on top, for the probability of success p on a single trial?a. p hat = r/nb. p hat = n+rc. p hat = n/rd. p hat = n-ralso: in order to use normal distribution to compute confidence intervals for p, what conditions on np and nq need to be satisfied? a. both np and nq have to be less than 5
b. both np and nq have to less than 50
c. both np and nq have to be greater than 50
d. both np and nq have to be greater than 5