B) after 9 months, what is the probability that the average monthly percentage return x will be between 1% and 2%z (round your answer to four decimal places)C) after 18 months, what is the probability that the average monthly percentage return x will be between 1% and 2% (round your answer to four decimal places)D)if after 18 months, the averAge monthly percentage return x is more than 2%, would that tend to shake your confidence in the statement that =1.5 %? P(x>2%) =

A European growth mutual fund specializes in stocks from the British Isles, continental Europe, and Scandinavia. The fund has over 400 stocks. Let x be a ra percentage return for this fund. Suppose x has mean u = 1.5% and standard deviation o = 1.4%. LO USE SALT (a) Let's consider the monthly return of the stocks in the fund to be a sample from the population of monthly returns of all European stocks. Is it reaso monthly return on the 400 stocks in the fund) has a distribution that is approximately normal? Explain. Yes v , x is a mean of a sample of n = 400 stocks. By the central limit theorem the x distribution is approxim (b) After 9 months, what is the probability that the average monthly percentage return x will be between 1% and 2%? (Round your answer to four deci (c) After 18 months, what is the probability that the average monthly percentage return x will be between 1% and 2%? (Round your answer to four deci