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You want to rent an unfurnished one-bedroom apartment in Boston next year. The mean monthly rent for a random sample of 11 apartments advertised in the local newspaper is $1200. Assume that the standard deviation is $230. How large a sample of one-bedroom apartments would be needed to estimate the mean? within ±$60with 95% confidence? (Round your answer up to the next whole number.)
In the week before and the week after a holiday, there were 10,000 total deaths, and 4972 of them occurred in the week before the holiday.
A survey of 500 internet users found that the users were online an average of 6.5 hours a week with a standard deviation of 3.1 hours. If 49 internet users are randomly selected what is the probability that their average time online will be more t..
a computer repair shop gets computers on regular basis for repairs. the repair time between two computers is
Perform 5 t-tests on the data comparing C1 to C2 on each of the 5 questions. Indicate which of the 5 variables has a difference between C1 and C2.
Carbon monoxide (CO) emissions for a certain kind of car vary mean 2.4 g/mi and standard deviation 0.7g/mi. A company has 60 of these cars in its fleet. Let y represent the mean CO level for the companies fleet. Estimate the probability that y is ..
Develop appropriate hypotheses such that rejection of H0 will support the researcher's contention.
consider a normal population with mu25 and sigma8.0.a. calculate the standard score for a value x of 23b. calculate the
Find the sample mean and sample standard deviation for the amount of unspent money returned at the end of the day.
Disney tells you that the average distance between the ears on a Mickey Mouse hat is 5 inches. In a sample of 100 Mickey Mouse hats you find that the average distance between the ears on the hats is 5.2 inches with a standard deviation of 1 inch.
Which of the following statements is true regarding the leverage of supply chain savings? Supply chain leverage is about the same for all industries.
calls to the help line of a large computer distributor follow a passion distribution with a mean of 20 calls per
What is the mean and standard deviation of the number preferring the incumbent and what is the probability that more than 68% will favor the incumbent?
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