question archive 1) Lets say you want a sleeping bag that should keep your warm from 20 degree F to 45 degree F
1) Lets say you want a sleeping bag that should keep your warm from 20 degree F to 45 degree F
Subject:StatisticsPrice: Bought3
1) Lets say you want a sleeping bag that should keep your warm from 20 degree F to 45 degree F. Assume the population of x values has an approximately normal distribution. 85,80,60,105,115,110,30,23,100,110 105,95,105,60,110,120,95,90,60,70 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 answer 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 u of all summer sleeping bags. (Round your answers to two decimal places) Lower limit $_____ Upper limit $_____ 2) How much do wild mountain lions weigh? Adult wild mountain lions (18 months or older) captured and released for the first time gave the following weights (pounds) 69,103,133,122,60,64 Assume that the population of x values has an approximately normal distribution A) use a calculator with mean and sample standard deviation keys to find the sample mean weight x and sample standard deviation s. (Round your answer to four decimal places) X=_____ lb S= ______lb B) find a 75% confidence interval for the population average weight u of all adult mountain lions in the specified region (round your answer to one decimal place) Lower limit_______ lb Upper limit ________ lb 3) assume that the population of x values has an approximately normal distribution 92, 179, 125, 93, 75, 94, 116, 100, 85 A) use a calculator with mean and sample standard deviation kets to find sample mean startup cost x and sample standard deviation s (round your answer to four decimal places) X= _____ thousand dollars S=_______thousand dollars B) find a 90 % confidence interval for the population average startup costs u for candy store franchises. (Round your answer to one decimal place) Lower limit ____ thousand dollars Upper limit _______ thousand dollars 4)assume the population of x values has an approximately normal distribution. 9.30, 9.60, 10.50, 9.50, 9.40, 9.80, 10.0, 9.90, 11.20, 12.10 A) use a calculator with mean and sample standard deviation keys to find the sample mean reading x and the sample standard deviation s (round your answer to four decimal places) X=_____ mg/dl S=_______mg/dl B) find a 99.9% confidence interval for the population mean of total calcium in this patients blood (round your answer to two decimal places) Lower limit _____ mg/dl Upper limit _____ mg/dl C) based on your results in part (b) do you think this patient still has a calcium deficiency? Explain ___ yes, this confidence interval suggests that the patient may still have a calcium deficiency. ___ yea, thus confidence interval suggest that the patient no longer has a calcium deficiency. ___no, this confidence interval suggest that the patient may still have a calcium deficiency ___ no, this confidence interval suggests that the patient no longer has a calcium deficiency 5)bases on a random sample of hospital reports from eastern states, the following information is obtained (units in percentage of hospitals providing Atleast some charity care): 56.7, 55.5, 52.7, 66.3, 59.0, 64.7, 70.1, 64.7, 53.5, 78.2 Assume that the population of x values has an approximately normal distribution A) use a calculator with mean and sample standard deviation keys to find the sample mean percentage x and the sample standard deviation s. ( round your answer to four decimal places) X= _____ % S= _______% B) fund a 90% confidence interval for the population average u of the percentage of hospital providing Atleast some charity care (round your answer to one decimal place. Lower limit _____ % Upper limit _______%
