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saranyachennakrishnan

saranyachennakrishnan

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Statistics4
Answer: 0.08325 Step-by-step explanation: Since, A and B are independent event...
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(a) Sample mean, = 64.1609 Sample Standard deviation, s = 27.8625 (b) The 80% ...
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Answer: The probability of independent events, P(AB) = P(A) * P(B)Step-by-step...
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3. [2.62/4.76 Points]
How much does a sleeping bag cost? Let's say you want a sleeping bag that should keep you warm in temperatures from } 20F to 45F. A random sample of prices ($) for sleeping bags in this temperature range is given below. 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 price and sample standard deviation s. (Round your answers to four decimal places.)
= $ _____
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 decimal places.)
lower limit           $ _______
upper limit           $ _______
 

 

Answer: (a) Sample mean, = 80.9000 Sample Standard deviation, s = 28.9353 (b) ...
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