Question: 1) Use the Cumulative Normal Distribution Table to nd the z-soores that bound the middle 90% of the area under the standard normal curve. Enter

Enter the answers in ascending order. Round the answers to two decimal

places. The zscores for the given area are D and D. A

normal population has mean p= and standard deviation o=16. (a) What proportion

of the population is greater than 95? (b) What is the probability

Use the Cumulative Normal Distribution Table to nd the z-soores that bound the middle 90% of the area under the standard normal curve. Enter the answers in ascending order. Round the answers to two decimal places. The zscores for the given area are D and D. A normal population has mean p= and standard deviation o=16. (a) What proportion of the population is greater than 95? (b) What is the probability that a randomly chosen value will be less than 80. Round answers to four decimal places. Baby weights: The weight of male babies less than 2 months old in the United States is normally distributed with mean 12.5 pounds and standard deviation 5.1 pounds. Use the TI-84 Plus calculator to answer the following. (a) What proportion of babies weigh more than 14 pounds? (b) What proportion of babies weigh less than 16 pounds? (c) What proportion of babies weigh between 11 and 15 pounds? (d) Is it unusual for a baby to weigh more than 17 pounds? Round the answers to four decimal places. Baby weights: The weight of male babies less than 2 months old in the United States is normally distributed with mean 12.5 pounds and standard deviation 5.1 pounds. Use the @ Cumulative Normal Distribution Table to answer the following. (a) Find the 81" percentile of the baby weights. (b) Find the 18" percentile of the baby weights. (c) Find the third quartile of the baby weights. Round the answers to at least two decimal places.Fish story: According to a report by the U.S. Fish and Wildlife Servioe, the mean length of sixyearold rainbow trout in the Arolik River in Alaska is 479 millimeters with a standard deviation of 39 millimeters. Assume these lengths are normally distributed. Round the answers to at least two decimal places. (a) Find the 55thl percentile of the lengths. (b) Find the 84th percentile of the lengths. (c) Find the rst quartile of the lengths. (d) A size limit is to be put on trout that are caught. What should the size limit be so that 15% of sixyear-old trout have lengths shorter than the limit? Electricity bills: According to a government energy agency, the mean monthly household electricity bill in the United States in 2011 was $109.54. Assume the amounts are normally distributed with standard deviation $16.00. Use the TI84 Plus calculator to answer the following. (a) Find the 9th peroentile of the bill amounts. (b) Find the 65th percentile of the bill amounts. (c) Find the median of the bill amounts. Round the answers to at least two decimal plaoes

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