QU ESTIDN 5 3 poi nts Save Answer In a particular area of the Nile, the mean weight of hippos is 3000 pounds with a standard deviation of 550 pounds. What is the probability that a hippo is more than 3,?50 pounds? Round your answer to four decimal places. QU ESTIDN S 3 poi nts Save Answer The Internal Revenue Service reports that the mean federal income tax paid in a recent year was $9500. Assume that the standard deviation is $5500. The IRS plans to randomly sample '110 tax returns to study the effect of a new tax law. Answer the following questions. Round all answers to tour decimal places if applicable. A. What is the mean of the sampling distribution? (2 points] B. What is the standard deviation ot'the sampling distribution? [2 points} C. What is the probability that the sample mean taxis more than $10000? (3 points} D. What percentile is the ta): amount of $9100? State in decimal form. {3 points]