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Researchers studied the effects of adding an exercise program to dieting in the achievement of weight loss. A sample of 16 men ages 18-20 (Group 1) were observed for weight loss using a diet only, and another independent sample of 14 men ages 18-20 (Group 2) were put on the same diet, but with an added exercise program. The mean weight loss for Group 1 was 7.7 pounds with a standard deviation of 4.6 pounds, and the mean weight loss for Group 2 was 14.5 pounds, with a standard deviation of 3 pounds. Calculate the test statistic for a test of the hypothesis that the mean weight loss for the two groups is the same. Give your answer to two decimal places.
consider a regression situation in which y hardness of molded plastic and x amount of time elapsed since termination
Use the sales forecaster's, predictions to describe a normal probability distribution that can be used to approximate the demand distribution.
Under the new structure of the sample, how will the answers to a, b, and c change and create a 95-percent confidence interval for the average distance of Brand A
If the basket ball player is a 74% free throw shooter, then, on average, how many free throws will he or she make in a game with eight free throw attempts?
Repetitions of numbers are not permitted, i.e., the same number cannot be used more than once in a total sequence. As examples, 27, 94 or 55 would not be permitted. How many different code groups can be designed?
construct an 80 confidence interval to estimate the population mean when x 125 and s 32 for the following sample
Determine the variance of X? (Illustrate your computation either in Table or in Equation form)
suppose we have far more variables than observations so that kgtn. we can include at most n-1 variables at which point
The average blood pressure reading will be less than 150 and hence fail to indicate that the patient has a high blood pressure problem?
The animal colony in the reseach department contains 20 male rats and 30 female rats. Of the 20 males, 15 are white and 5 spotted. Of the 30 females, 15 are white, and 15 are spotted.
Suppose that you wish to test the effect of lowering the soil ph on the number of lady ferns in an area. The researchers hypothesize that lowering the ph-level of the soil will lead to more ferns.
Can we conclude that more than 60% of retired people in the age group would return to work? I need to do a Hypothesis Testing using only P value format (Explain in everyday words but also have the formal steps show with results) on this problem.
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