Problem 5: [n a random sample of (if: patients at a hospital ER. waiting room1 the mean waiting time was 38.8 minutes. The hospital administration reported that the average waiting time is less than 9|] minutes with a stande deviation of 5.5 minutes. Use the calculator {Z-Test} to test the claim about the population mean a. Don't forget to write null and alternative hypotheses1 identify if the the hypothesis test for this claim is left-tailed? right-tailed1 or two-tailed, write decision and conclusion. Problem 6: [n a survey of 25] US. adults 163 were concerned that their taxes will he audited by the Internal Revenue Service. However, ofcial statistics reported that no more than 62% of US. adults wories about it. Use the calculator {l-Prop-Z-Test} to test the claim about the population proportion 33. Don't forget to write null and alternative hypotheses1 identify if the the hypothesis test for this claim is left-tailed... right-tailed1 or two-tailed, write decision and conclusion