g in a random sample of 24 residents of the state of texas, the mean waste recycled per person per day was 1.2 pounds with a standard deviation of 0.99 pounds. determine the 90% confidence interval for the mean waste recycled per person per day for the population of texas. assume the population is approximately normal.step 1 of 2 : find the critical value that should be used in constructing the confidence interval. round your answer to three decimal places.