Mathematics, 31.10.2019 04:31 shaylawaldo11
You are the manager of a restaurant for a fast-food franchise. last month, the mean waiting time at the drive-through window for branches in your geographical region, as measured from the time a customer places an order until the time the customer receives theorder, was 3.9 minutes. you select a random sample of 81 orders. the sample mean waiting time is 4.05 minutes, with a sample standard deviation of 0.9 minute.
at the 0.01 level of significance, is there evidence that the population mean waiting time is different from 3.9 minutes? state the null and alternative hypotheses
determine the test statistic.(two decimal places)
find the p-value.(three decimal places)
what is the conclusion
do i need to be concerned about the shape of the population distribution?
Answers: 3
Mathematics, 21.06.2019 21:00
Can some one explain how to slove specifically, what is the value of x? 0.9(x+1.4)-2.3+0.1x=1.6 enter the answer as a decimal in the box. x= ?
Answers: 2
Mathematics, 21.06.2019 21:40
In a survey of 1015 adults, a polling agency asked, "when you retire, do you think you will have enough money to live comfortably or not. of the 1015 surveyed, 534 stated that they were worried about having enough money to live comfortably in retirement. construct a 90% confidence interval for the proportion of adults who are worried about having enough money to live comfortably in retirement.
Answers: 3
You are the manager of a restaurant for a fast-food franchise. last month, the mean waiting time at...
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