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The time it takes to do an oil change and lubrication job on a vehicle has a normal distribution with a mean of 17.8 minutes and a standard deviation of 5.2 minutes. An auto service shop will give a free lube and oil change service to any customer who must wait beyond the guaranteed time to complete the work. If the shop does not want to give more than 1% of its customers a free lube and oil change service, how long should the guarantee be? Round appropriately to the minute.
Compute a 5-month moving average forecast for June through January.
On the fictitious game show "Marginal Analysis for Everyone" the host subjects contestants to unusual tests of mental skill. On one, a contestant may choose one of two identical envelopes labeled A and B, each of which contains an unknown amount o..
What is the 'Equally-likely Outcomes Model of Probability?" What is the formula for this model of probability?
Develop four probability questions using the table that you as an instructor of statistics might ask a class of students for a test in probability.
In a regression analysis, the sum of the squared deviations between y and y-bar is SST = 200.0. If the sum of the squared deviations about the regression line is SSE + 40.0, what is the coefficient of determination?
Assuming no discrimination based on gender, what is the probability of getting 41 or fewer women when 100 new employees are hired?
Assuming the nurses surveyed were a simple random sample from the population of all nurses in the United States, find the appropriate null hypothesis for these data
Calculate, test, and interpret the relationship between two variables using the correlation coefficient.
A software company wants to determine whether there is a relationship between their three sales offices and the sales of their software products. The actual sales results are
Recognize sample, population, sample statistic, and population parameter: Nasonex is the drug used to treat allergy symptoms.
Describe the correct statistical procedures for analysis for how has quality of care changed in hospitals that are part of a pay for performance (P4P) program?
Conduct a matched pairs t-test to see if the differences in locations is significant - The air in poultry-processing plants often contains fungus spores.
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