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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.
Discuss the reasons why your company would want to expand overseas. Discuss what your mode of international business would be and how moving abroad will expand sales.
It is known by experience that 50% of all people that receives some kind of catalog by mail will order some product. FInd the probability that only 3 out of 9 people that receive this kind of catalog will order a product.
A recent article in Business Week listed the "Best Small Companies." We are interested in the current results of the companies' sales and earnings.
A manager is thinking of providing, on a regular basis, in-house training for employees preparing for an inventory management certification exam. In the past, some employees received the in-house training before taking the exam, while others did n..
a trial program is carried out to lower the recidivism rate of convicts that is the rate at which released prisoners
1. The Inn at Columbia has 150 rooms with standard queen-size beds and two two rates: a full price of $200 and a discount price of $120. To receive the discount price, a customer must purchase the room at least two weeks in advance (this helps to ..
Determine the fraction of the time that no light bulbs are working.
Calculation of Mallows Cp and Mallows Cpk
Last week I used a stopwatch to measure the echo time of my snare drum in the hall outside my classroom, which is 80 meters long. The average echo time was 10 milliseconds.
Briefly discuss the concept of mode, mean, median. What is it? How is it calculated? When would we use each one? Find the median birth weight in grams. Provide an interpretation of your results
The lowess fitted value is 0.883. Thus the value of adj discussed on the previous slide is 0.883 for spots with A=7. How is the lowess curve determined?
A research study reports t(14) = 2.17. How many individuals participated in the study? Is this t statistic sufficient to reject the null hypothesis using a two-tailed test with alpha = 0.05?
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