a. In a random sample of 200 observations, we found

a. In a random sample of 200 observations, we found the proportion of successes to be 48%. Estimate with 95% confidence the population proportion of successes.,b. Repeat part (a) with n = 500.,c. Repeat part (a) with n = 1000.,d. Describe the effect on the confidence interval estimate of increasing the sample size.