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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.
bev can either take a course in computers or in chemistry. if bev takes the computer course then she will receive an a
in a town 60 of families are known to drive european cars. in a sample of 10 families what is the probability that at
researchers measured the seated systolic blood pressure of 27healthy white males. the resulting publication reports x
Is there sufficient evidence for one to claim that in general, rugby players have a higher BMI than the multisport men? Perform the test at the 0.01 level of significance.
Find P-Value with 0.05 significance level, and state the conclusion about the null hypotheses (reject or fail to reject) With H1: p is not equal to 3/4, the test statistic is z=0.35
Egyptians watch an average of 2.5 hours of television per person per day. If the standard deviation for the number of hours of television watched per day is 1.6 and a random sample of 225 Egyptians is selected, the mean of this sample belongs to a..
Compute the population attributable risk for smoking and lung cancer.
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the content of a particular constituent in two different brands of a drug measured in milligrams was found to be as
a sales representative must visit six cities. there are direct air connections between each of the cities. use the
a manufacturing company wants to investigate the product coming out of two machines has a similar diameter or not. it
A survey found that at most 40% of those surveyed planned to get more sleep. A sample of 300 people found that 140 of them plan to get more sleep. For alpha = 0.01, what is the critical value?
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