Find the sample size necessary to estimate the mean IQ score ofstatistics students such that it can be said with 95​% confidencethat the sample mean is plus or minus3 IQ points of the true mean.Assume that the standard deviation is 15 and determine the requiredsample size.
2)
In a survey of
2,416 adults, 1,876 reported that​ e-mails are easy to​misinterpret, but only 1,231 reported that telephone conversationsare easy to misinterpret. Complete parts​ (a) through​ (c)below.
a. Construct a​ 95% confidence interval estimate for thepopulation proportion of adults who report that​ e-mails are easyto misinterpret.
