ind the minimum sample size n needed to estimate u for the given values of c, o, and E. c = 0.95, o =7.7, and E =1 Assume that a preliminary sample has at least 30 members. n= (Round up to the nearest whole number.) Construct the confidence interval for the population mean p. C=0.98, x = 5.8, o =0.8, and n =60 A 98% confidence interval for u is () (Round to two decimal places as needed.)