A researcher want to determine an interval estimate for the average weight of adult gorillas in pounds. She wants to be 8096 certain that she is within 5 of the true average. From past studies, it is known that the standard deviation of the weights of adult gorillas is 12.3 pounds. I- What is the minimum sample size necessaryr to estimate the population mean? Round your answer up to the next integer. A manager claims the average sales per employee is more than $550 per shift. For which confidence interval should you reject He? 0 {430 {c 560] O {4?0 to we] D {500 to 555] O {429 to 520]