Question 5 4 pts 9 1 0 Details A researcher want to determine an interval estimate for the average weight of adult gorillas in pounds. She wants to be 90% certain that she is within 4.2 of the true average. From past studies, it is known that the standard deviation of the weights of adult gorillas is 11.2 pounds. . What is the minimum sample size necessary to estimate the population mean? Round your answer up to the next integer. Add Work Check Answer Submit and End