You measure 22 textbooks' weights, and find they have a mean weight of 32 ounces. Assume the population standard deviation is 12.6 ounces. Based on this, construct a 90% confidence interval for the...

You measure 22 textbooks' weights, and find they have a mean weight of 32 ounces. Assume the population standard deviation is 12.6 ounces. Based on this, construct a 90% confidence interval for the true population mean textbook weight.

Give your answers as decimals, to two places