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The P-value for top spas. Refer to Exercises 1 and w. Find μW, σW, and the standardized rank sum statistic. Then give an approximate P-value using the Normal approximation with the continuity correction. What do you conclude?
Exercises 1Hypotheses and test statistic for top spas. Refer to Exercise 2. State appropriate null and alternative hypotheses for this setting and calculate the value of W, the test statistic.
Exercise 2Numbers of rooms in top spas. A report of a readers' poll in Condé Nast Traveler magazine ranked 36 top resort spas. Let Group A be the top-ranked 18 spas, and let Group B be the next 18 rated spas in the list. A simple random sample of size 5 was taken from each group, and the number of rooms in each selected spa was recorded. Here are the data:
Group A
552
448
68
243
30
Group B
329
780
560
540
240
Rank all the observations together and make a list of the ranks for Group A and Group B.
While it can't be denied that advertising impacts sales, it is also true that advertising is expensive and companies want to advertise in ways that have the greatest benefit for the amount of money spent.
Decide whether the normal sampling distribution can be used. If it can be used, test the claim about the population proportion p at the given level of significance α using the given sample statistics.
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A fast food restaurant estimates that the mean sodium content in one of its breakfast sandwiches is no more than 920 milligrams. A random sample of 44 breakfast sandwiches has a mean sodium content of 925 milligrams. Assume the population standard..
Suppose that the incident rate of a particulat kind of accient is 1/10,000 persons. In a town of 50,000 persons, what is the probability that there is no accident of this kind?
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