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the mean of a small pilot study was 73 days with a standard deviation of 14 days. If the population meanis to be estimated to within two days, with 95% confidence, how many outside salespeople should be sample.
How should he go about taking samples to gather data for testing the hypotheses?
Use differential to approximate square root of 16.3
Provide a 95% confidence interval for the difference between the two population means. Compare the means of population 1 and population 2. Are they equal? Show your test procedure.
The prior year, the population mean expenditure per household was $632. Discuss the change in holiday season expenditures over the one-year period.
Standard deviation of $5,000. What is the lowest salary for those individuals with an MBA degree whose starting salary is in the top 10 percent?
Comment on their success or failure to meet this goal.
Studies from a local mall show the typical shopper spends 0.75 hrs shopping. the standard deviation is 0.10 hours. A sample of 45 shoppers revealed the mean time spent increased to .080.
Clouds were randomly seeded or not with silver nitrate. Rainfall amounts were recorded from the clouds. The purpose of the experiment was to determine if cloud seeding increases rainfall. The following data is obtained:
At the .01 significance level, is there a difference in the use of the four entrances?
At the .01 significance level, is there a difference in the mean number of times men and women order take-out dinners in a month? What is the p-value?
Following data on x=weight (in pounds): x 1 33.5, x2 27.3, x3 36.7, x4 30.5 Suppose that one more piece is selected; denote its weight by x5. Find a value of x5 such that X = smaple median.
Each of these systems functions, independently of the others, with probability 0.98. As long as at least one of these systems is functioning, this shuttle Component functions successfully.
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