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Question: The MacBurger restaurant chain claims that the waiting time of customers for service is normally distributed, with a mean of 3 minutes and a standard deviation of 1 minute. The quality control department found in a sample of 50 customers at the Warren Road MacBurger that the mean waiting time was 2.75 minutes. Can we conclude that the mean waiting time is less than 3 minutes?
Use = .05.
a. State the null hypothesis and the alternative hypothesis.
b. State the decision rule.
c. Compute the value of the test statistic.
d. What is your decision regarding H0?
e. What is the p-value? Interpret it.
Using a level of significance of .10, is there evidence that the dual degree students are receiving lower grades? Fully explain your answer.
A. What is the probability that an employee will have a cold next year?b. Given that an employee is involved in an exercise program, what is the probability that he or she will get a cold next year?c. What is the probability that an employee who is n..
3.genotypes aa aa and aa occur with probabilities ?1 ?2 ?3. for n3 independent observations the observed frequencies
a 98 confidence interval estimate for a population mean was computed to be 26.4 47.8. determine the mean of the sample
If there is one-year warranty on the equipment, what proportion of the customers will actually make a valid warranty claim?
Drug is effective on 89% of women and 65% of men. It is known that 66% of the people who take the drug are women. What is the probability that the drug is effective?
F90 posted a question Sep 18, 2014 at 12:58pm ..
The Wilcoxon signed rank statistic, The mean for the Wilcoxon signed rank test and The P-value for the Wilcoxon signed rank test
Suppose the national average for all young adults is 3.7 hours, and the magazine wishes toclaim that their subscribers exercise more on average. State the relevant hypotheses to test this claim. Specifically define any symbols you use.
the grocery manufacturers of america reported that 76 of consumers read the ingredients listed on a products label.
random variable Y that has an exponential distribution with mean equal to 4 tons. The cost of the flour is proportional to U=3Y+1. Find the probability density function for U.
You want to estimate today's mean temperature, so you make a series of measurements (taken as a sample) throughout the day. The mean of these measurements is 63 degrees Fahrenheit, and their standard deviation is 3.4 degrees Fahrenheit.
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