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Dietary supplementation by centre. Refer to the previous exercise. A majority of the athletes came from the Sport Centres in Ontario and in Calgary, Alberta. Below is a table summarizing the number of athletes and the number who used supplements at each of the centres.
Test the hypothesis that the proportion of athletes using supplements is the same at the two centres. State the two hypotheses, the test statistic, P-value, and your conclusion.
advertisements for an instructional video claim that the techniques will improve the ability of little league pitchers
A random sample is taken to determine what percentage of a large city will vote for a certain candidate for mayor. To save time the polling company decides to randomly selected households and survey each person eligible to vote living in the house..
Suppose that a random sample of 100 accounting transactions using the old method reveals 18 in error, and a random sample of 100 accounts using the new method reveals 6 errors. Is there evidence of difference in method effectiveness? Explain.
Use whole numbers 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 to make up a list of 6 numbers. Use as many of the numbers, as many times as you want. Show a list of six numbers with the largest variance, and a list of six numbers with the smallest variance.
the repair time for air conditioning units is believed to have a normal distribution with a mean of 39 minutes and a
You wish to evaluate the proportion of customers who are satisfied with their supermarket at level of confidence of .92 and in .025 of true value. How large of sample is required?
How many water samples must the limnologist analyze to be 90% certain that the error of estimation does not exceed 0.8 milligrams?
What descriptive summary measures would you use to present the data. which measure is the best to use and which is the worse and why?
Table 7.17 is from a General Social Survey. White subjects in the sample were asked: (B) Do you favor busing (Negro/Black) and white school children from one school district to another?, (P) If your party nominated a (Negro/Black) for President, w..
List the possible outcomes of this experiment. How many are there? Would you expect each outcome to be equally probable?
A data set of ordered pairs with a negative linear correlation has a coefficient of determination of 85.2%. What is the linear correlation coefficient?
What is the difference between a null hypothesis and an alternative hypothesis? Is the null hypothesis always the same as the verbal claim or assertion that led to the test? Why or why not?
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