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At the time she was hired as a server at the Grumney Family Restaurant, Beth Brigden was told, "You can average $72 a day in tips." Assume the population of daily tips is normally distributed with a standard deviation of $2.45. Over the first 34 days she was employed at the restaurant, the mean daily amount of her tips was $73.07. At the .10 significance level, can Ms. Brigden conclude that her daily tips average more than $72?
(a) State the null hypothesis and the alternate hypothesis.
(b) State the decision rule.
(c) Compute the value of the test statistic. (Round your answer to 2 decimal places.)
(d) What is your decision regarding H0?
(e) What is the p-value? (Round your answer to 4 decimal places.)
1) The mean of the twenty male IQ scores is 115. Test the hypothesis that the mean of female IQ scores is less than 115. Note: This test is not comparing the mean IQ of females to that of males, it is simply using 115 as a comparison value. In the..
Computing the mean and standard deviation for the given data - Find the value for the new standard deviation
The so-called "Gambler's Fallacy" makes the mistake of not recognizing:
Biting an unpopped kernel of popcorn hurts! As an experiment, a self-confessed connoisseur of cheap popcorn carefully counted 773 kernels and put them in a popper. After popping, the unpopped kernels were counted. There were 86.
A random sample of 77 eighth grade students' scores on a nation mathematics assessment test has a mean score of 278 with a standard deviation of 31.
This exercise is a "what if analysis" designed to determine what happens to the test statistics and interval estimates when elements of the statistical inference change.
If alternate hypothesis mention that m doesn't equal 4,000, determine the rejection region for the hypothesis test?
Explain the difference between multiple independent variables and multiple levels of independent variables. Which is better?
A arbitrary sample of 8 students is selected. Illucidate the probability that among the students in the sample at least 7 are female.
What is the equation for this regression model?
A retail grocer has decided to market organic "health foods" and will purchase a new line of products from each of two suppliers. Unknown to the grocer
What is it that differentiates a binomial probability distribution from any other probability distribution? & The employees at a General Motors assembly plant are polled as they leave work.
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