You measure 20 backpacks' weights, and find they have a mean weight of 80 ounces. Assume the population standard deviation is 11.4 ounces. Based on this, construct a 90% confidence interval for the...

You measure 20 backpacks' weights, and find they have a mean weight of 80 ounces. Assume the population standard deviation is 11.4 ounces. Based on this, construct a 90% confidence interval for the true population mean backpack weight.


Give your answers as decimals, to two places


 ________±____________ ounces