The standard iq test is designed so that the mean is 100100 and the standard deviation is 1515 for the population of all adults. we wish to find the sample size necessary to estimate the mean iq score of statistics students. suppose we want to be 9090% confident that our sample mean is within 22 iq points of the true mean. assume then that σ=15σ=15 and determine the required sample size.

Perry angelo is planning to open a restaurant. he has the resources to produce and sell either hamburgers or pizzas. so he does some research and finds that the new location has a good demand for pizza. he hires cooks, wait staff, and an accounts person for his new pizzeria. he also arranges for materials such as pizza ingredients and pizza boxes. determine three factors affecting perry's cost of making pizza. write down the name of the factors and their instances in this scenario.