The method of tree ring dating gave the following years A.D. for an archaeological excavation site. Assume that the popu

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The Method Of Tree Ring Dating Gave The Following Years A D For An Archaeological Excavation Site Assume That The Popu 1 (114.47 KiB) Viewed 6 times

The method of tree ring dating gave the following years A.D. for an archaeological excavation site. Assume that the population of x values has an approximately normal distribution. 1,264 1,208 1,201 1,215 1,268 1,316 1,275 1,317 1,275 LAUSE SALT (a) Use a calculator with mean and standard deviation keys to find the sample mean year x and sample standard deviation s. (Round your answers to four decimal places.) A.D. yr S= (b) Find a 90% confidence interval for the mean of all tree ring dates from this archaeological site. (Round your answers to the nearest whole number.) lower limit A.D. A.D. upper limit -/4.42 Points] DETAILS How much does a sleeping bag cost? Let's say you want a sleeping bag that should keep you warm in temperatures from 20°F to 45°F. A random sample of prices ($) for sleeping bags in this temperature range distribution. BBUNDERSTAT127.2.014.MI.S. 115 40 50 70 85 45 30 23 100 110 105 95 105 60 110 110 120 95 90 60 70 LAUSE SALT (a) Use a calculator with mean and sample standard deviation keys to find the sample mean price x and sample standard deviation s. (Round your answers to four decimal places.) x = $ S = $ (b) Using the given data as representative of the population of prices of all summer sleeping bags, find a 90% confidence interval for the mean price of all summer sleeping bags. (Round your answers to two lower limit $ upper limit $ S = -/4.42 Points] DETAILS Do you want to own your own candy store? Wow! With some interest in running your own business and a decent credit rating, you can probably get a bank loan on startup costs for franchises such as Candy Exp costs (in thousands of dollars) for a random sample of candy stores are given below. Assume that the population of x values has an approximately normal distribution. 96 174 134 100 75 94 116 100 85 USE SALT BBUNDERSTAT12 7.2.016.S. (a) Use a calculator with mean and sample standard deviation keys to find the sample mean startup cost x and sample standard deviation s. (Round your answers to four decimal places.) thousand dollars X= thousand dollars. (b) Find a 90% confidence interval for the population average startup costs for candy store franchises. (Round your answers to one decimal place.) lower limit thousand dollars upper limit thousand dollars