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1) This table summarizes the results from along+termrandomized clinicaltrial to determine whether aspirin reduces the risk of heart attack. Researchers randomly assigned a large sample of healthy male physicians (22,071) to one of two groups. One group took a low dose of aspirin (325 mg every other day). The other group took a placebo. Here are the final results.
Heart Attack
No Heart Attack
Totals
Aspirin
139
10,898
11,037
Placebo
239
10,795
11,034
378
21,693
22,071
Research Question:
Does daily doses of aspirin lower the risk of a heart attack?
(Hit, some of the questions to consider
a) How much lower is the risk of a heart attack for those who took aspirin in the study?
b) What is the relative risk of a heart attack?
c) What is the percent decrease in risk of a heart attack if someone took aspirin daily?)
Suppose that the critical region for a certain test of hypothesis is of the form T greater than or equal to 2.5 and the computed value of T from the data is -2.75.
The following table describes the estimated green power sales by renewable energy in 2008: Develop a bar chart, pie chart, and Pareto Chart.
Crohn's disease. In 2002 the medical journal The Lancet reported that 335 of 573 patients suffering from Crohn's disease responded positively to injections.
This week dicussion topics are: Inferential Statistics, Confidence Interval for Population Mean, t-Distribution.
Technology and the Internet In its Millennium Development Goals Report, the United Nations suggested that by the end of 2013 there will be 6.8 billion.
Results for a 1997 survey of about 25,000 female nonfarm wage and salary workers were published in the Monthly Labor Review in 1998
What is the probability that exactly 2 balls will be white? Calculate your answer rounded to three decimal places.
In a large clinical trial of 500 patients treated with a new drug, 40 reported sideeffects how many patients would need to be sampled to estimate the desired proportion to within a margin of error of 1%, using 98% confidence?
Suppose you receive a shipment of 33 computers, two of which are defective. What is the probability of picking a sample of 6 computers with exactly one bad computer in it? a girl is seated at each end of the row?
suppose 80 of the college football fans root for the home team. if 400 fans who attended a college football game last
STA 141A Fall 2016 Homework. Compute the decision boundary for linear discriminant analysis, using Sepal.Length as the predictor variable. Compute the confusion matrix for the test data set
The dividend is expected to grow at a 7% annual rate. The return on equity for similar stocks is 14%. What is P0? (Show workings)
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