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Question: Diet and bowel cancer. It has long been thought that eating a healthier diet reduces the risk of bowel cancer. A large study cast doubt on this advice. The subjects were 2079 people who had polyps removed from their bowels in the past six months. Such polyps may lead to cancer. The subjects were randomly assigned to a low-fat, high-fiber diet or to a control group in which subjects ate their usual diets. Did polyps reoccur during the next four years?
(a) Outline the design of this experiment.
(b) Surprisingly, the occurrence of new polyps "did not differ significantly between the two groups." Explain clearly what this finding means.
Pearson correlation of r = +0.85 indicates that a graph of the data would show ___. Clustered close to a line that slopes up to the right points clustered close to a line that slopes down.
What criterion would be used for rejecting the null hypothesis? Assume that the standard deviation, σ, of the population is known.
1. you are interested in testing the distance of two golf balls brand a and brand b. you take a random sample of 100
A researcher, for reasons passing understanding, wishes to assess the association between gender and total cholesterol values. What would be the appropriate statistical procedure
Here are some data that I analyzed for an attorney. Of the 4200 white applicants at a large manufacturing facility, 390 were hired. Of the 850 black applicants, 18 were hired. Analyze the data and write a conclusion.
A significance test is performed and p=.20. Why cant the experimenter claim that the probability that the null hypothesis is true is .20?
These two questions relates to Basic Statistics. The first question discusses about computation of correlation. The second question is about the features of correlation coefficient
supposed 57 of the registered voters in a country are republican.if a sample of 722 voters is selected what is the
an engineer must decide between spread footings or piles for a foundation to support each column of a
If active redundancy is the only means of achieving further reliability growth for each of the subsystems, what is the minimum number of redundant units of each necessary to achieve the component reliability goals?
If you increase in the equation, would it move the graph upward? Express your answer in terms of time, initial position, initial velocity, and acceleration.
these instructions apply to all the problems.a draw thenbspscatter plotnbspfor the variables.b compute
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