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Question: Science News (February 25, 1995, p. 124) reported a study of 232 people aged 55 or over who had had heart surgery. The patients were asked whether or not their religious beliefs give them feelings of strength and comfort and whether or not they regularly participate in social activities. Of those who said yes to both, about 1 in 50 died within 6 months after their operation. Of those who said no to both, about 1 in 5 died within 6 months after their operation. What is the relative risk of death (within 6 months) for the two groups? Write your answer in a sentence or two that would be understood by someone with no training in statistics.
Suppose that the heights of adult women in the United States are normally distributed with a mean of 63.5 inches and a standard deviation of 2.4 inches.
hamilton county judges try thousands of cases per year. in an overwhelming majority of the cases disposed the verdict
Supposing that the entire $10,000 can be spent on tires (ignoring other costs), and that the true fraction that will fail is approximately .05, can NHTSA attain its goal while staying within the budget? Describe.
How would you define the Wilcoxon Signed Rank Test?
A fair die is rolled until win or loss occurs: For k=1 to 5: if a 6 occurs on the kth roll you win N dollars and game ends; if a number
On a rainy day each of the components independently functions with probability p1, whereas on a dry day they each independently function with probability p2. If the probability of rain tomorrow is α, what is the probability that the satellite will..
How is a sampling distribution of the mean similar to and different from a distribution of raw scores? What is the standard deviation of a sampling distribution of the mean called? How is it affected by sample size?
The production manager wants to estimate the proportion of defective parts received from this supplier. She believes the proportion defective is no more than 0.15 and wants to be within 0.04 of the true proportion of defective parts with a 90% lev..
1.regular exercise is supposed to make your heart stronger and lower the resting pulse rate. 91 individuals reported
Calculate the standard error of estimate for the regression equation.
What will be the appropriate test to see if its products are produced at the desired sample?
A chemistry professor at ASU has 36 questions that she uses on her exams. Her exams always have 11 questions. How many distinct exams can she give? The order of the questions does not matter
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