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Q1) A basketball coach claims that by taking a "special" vitamin, a weight lifter can increase his strength. Eight players are selected and given a test of strength. After two weeks of training, supplemented by the vitamin, they are tested again. Test the effectiveness of the vitamin at Alpha = .05.
Q2) Find the 90% confidence interval for the data above.
Q3) In a sample of 200 Dr's, 15% thought that the government should control health care. In a sample of 200 nurses, 21% felt the same way. At Alpha = .01, is there a difference in the proportions?
Q4) Find the 95% confidence interval for the data above.
Use the mean, median, and mode to make a statement about the difference in performance for city and highway driving.
What is the value of the population mean? What is the best estimate of this value?
Delayed jobs normally results in lost business, which estimated to be C2 per job per week.Determine the optimum production rate?
This information was also obtained from monitored calls. At the .05 significance level does it take longer to resolve software issues? What is the p-value?
Expalin what would be the appropriate statistical procedure to test the following hypothesis: Triglyceride values are a good predictor of weight in obese adults.
Heights of men on a baseball team have a bell-shaped distribution with a mean of 177cm and a standard deviation of 5cm. Using the empirical rule, what is the approximate percentage of the men between the following values?
A survey covering 0 different suburbs in Dallas found the average price of gasoline to be $3.924 per gallon with a population standard deviation of $0.053. What critical value shoiuld be used to test the claim using a = 0.01?
As long as there is either an upward or downward trend in the data, will a k-period moving average have a smaller mean square error than a moving average obtained with k+1 periods? Why or why not?
The uniform distribution over the interval 7.5 to 10.5 gallons per minute. Find the probability that between 8.0 gallons and 9.0 gallons are pumped during a randomly selected minute.
You want to show an increase in buying and selling of single-family homes this year when compared with last year's rate.
It is suspected that the mean turnover has changed and is not 6.0. Use the .05 significance level. State the null hypothesis and the alternate hypothesis.
Describe different methods of establishing correlation between variables and provide an example of each. Discuss the advantages and disadvantages of each method and where each must be applied.
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