You measure 49 textbooks' weights, and find they have a mean weight of 70 ounces. Assume the population standard deviation is 5 ounces. Based on this, construct a 90% confidence interval for the true...

You measure 49 textbooks' weights, and find they have a mean weight of 70 ounces. Assume the population standard deviation is 5 ounces. Based on this, construct a 90% confidence interval for the true population mean textbook weight.


Give your answers as decimals, to two places