A random sample of 39 shoppers showed that they spend an average of $24.35 per visit at the Saturday Mornings Bookstore.
Posted: Mon Nov 15, 2021 12:22 pm
A random sample of 39 shoppers showed that they spend an average of $24.35 per visit at the Saturday Mornings Bookstore. The standard deviation of the population was $2.80. Find the 90% confidence interval of the true mean.