1. A random sample of 100 observations from a Poisson distribution has a mean equal to 6.25. Construct an approxi mate 95 percent confidence interval for the mean of the distribution.
2. Say that a random sample of size 25 is taken from a binomial distribution with pa rameters n = 5 and p. These data are then lost, but we recall that the relative frequency of the value 5 was -fs . Under these conditions, how would you estimate p? Is this suggested estimate unbiased?