. You measure 36 textbooks' weights, and find they have a meanweight of 30 ounces. Assume the population standard deviation is 10ounces. Based on this, construct a 90% confidence interval for thetrue population mean textbook weight.
Give your answers as decimals, to two places
Assume that a sample is used to estimate a population proportionp. Find the 80% confidence interval for a sample of size155 with 138 successes. Enter your answer using decimals (notpercents) accurate to three decimal places.
You measure 48 turtles' weights, and find they have a meanweight of 57 ounces. Assume the population standard deviation is13.8 ounces. Based on this, determine the point estimate and marginof error for a 95% confidence interval for the true population meanturtle weight.
Give your answers as decimals, to two places
