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A carpet manufacturer is studying differences between two of its major outlet stores. The company has decided to revise and improve its operations and response time to customer needs and is particularly interested in the time it takes customers to receive carpeting that was ordered from the plant. A sample of 41 delivery times for the most popular type of carpet for store A revealed an average delivery time 34.3 days with a standard deviation of 2.4 days. A similar sample of 31 delivery times for store B revealed an average of 43.7 days with a standard deviation of 3.1 days. At the .05 level of significance, is there evidence of a difference in variability in the shipping time between the two outlets? What decision should the carpet manufacturer make?
The standard deviation of the sample is $3,000. Interpret your findings.
With the test statistic you chose, work out the problem with solution using .05 level of significance if it applies.
Indicate which would be the independent variable and which would be the dependent variable in each of the following:
At.05 level of significance test to find out if number of breakdowns is independent of shift.
According to Bienayme-Chebyshev rule, what percentages of these funds are likely to be within ±2 standard deviation of mean?
The New York Times reported (L.J> Flynn, Tax Surfing, The New York Times, March 25, 2002, p. C10) that the mean time to download the home page for the internal Revenue Service (IRS) , was 0.8 second. Suppose that the download time was normally di..
What is the mean of this uniform distribution? What is the standard deviation?
Do students tend to improve their SAT Mathematics (SAT-M) score the second time they take the test? A random sample of four students who took the test twice received the following scores
200 people were surveyed and asked to rate mayor Michael Bloombergs effectiveness towards education. The rate scale is 1 (lowest) to 10 (highest). Mayor Bloomberg's average rating was 7.50, with a standard deviation of 2
Find the mean and standard deviation for the population and population of exam scores
What would you predict the price per share to be if 95 million shares were offered?
Use a decision tree to describe the possible strategies and the consequences (or payoffs) of each. Show your decision tree.
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