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The time required for an automotive center to complete an oil change service on an automotive approximately follows a normal distribution, with a mean of 19 minutes and a standard deviation of 2.5 minutes.
a. The automotive center guarantees customers that the service will take no longer than 20 minutes. If it does take longer, the customer will receive the service for half-price. What percent of customer receive the service for half-price?
b. If the automotive center does not want to give the discount to more than 7% of its customer, how long should it make the guaranteed time limit?
at the downtown office of first national bank there are five tellers. last week the tellers made the following number
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If the claim says that the population mean is greater than 200 and the sample mean is 215, we can say that the claim is true even without a formal test.
consider rolling two fair dice one green and one red. let r be the random variable which determines the face value of
Develop three regression models to predict the selling price based upon each of the other factors individually. Which of these is best?
Construct a 95% confidence interval for the average amount its credit card customers spent on their first visit to the chain's new store in the mall assuming that the amount spent follows a normal distribution.
old faithful geyser time intervals in minutes between eruptions of old faithful geyser in yellowstone national park98
Gas Station pump signs, at one chain, encourage customers to have their oil checked, claiming that one out of every four cars should have its oil topped.
A manager wishes to find out whether there is a relationship between the number of radio ads aired per week and the amount of sales (in thousands of dollars) of a product. The data for the sample are shown below. a) Draw the scatter plot for the v..
According to the hypothesis that the current year's seed does not meet the 85% germination rate standard at the 5% level of significance. What is the corresponding test statistic value?
q.nbspnbspstudents in a management science class have just received their grades on the first test. the instructor has
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