Use the information about each of the following samples to compute the confidence interval to estimate p. a. n=43 and p^=0.42; compute a 90% confidence interval. b. n=307 and p^=0.78; compute a 95% confidence interval. c. n=1,167 and p^=0.54; compute a 90% confidence interval. d. n=91 and p^=0.41; compute a 88% confidence interval. (Round your answers to 3 decimal places, e.s. 0.253.) a. p b. p c. p d. p