You measure 39 textbooks' weights, and find they have a mean weight of 34 ounces. Assume the population standard deviation is 10.2 ounces. Based on this, construct a 90% confidence interval for the...

You measure 39 textbooks' weights, and find they have a mean weight of 34 ounces. Assume the population standard deviation is 10.2 ounces. Based on this, construct a 90% confidence interval for the true population mean textbook weight.


Give your answers as decimals, to two places