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In a test of the effectiveness of garlic for lowering cholesterol, 42 subjects were treated with garlic in a processed table form. Cholesterol levels were measured before and after the treatment. The changes in their levels of LDL cholesterol (in mg/dL) have a mean of 4.8 and a standard deviation of 16.6.
What is the best point estimate of the population mean net change in LDL cholesterol after the garlic treatment?
Please show all work how you got the answer.
A major department store chain is interested in estimating the average amount its credit card customers spent on their first visit to the chain's new store in the mall.
the hunters fire at the same time but each chooses his target at random independently of the others. if each hunter
Construct the 90% confidence interval for the true population proportion of all voters in the state who favor approval.
you want to compare years of schooling among american adults who describe their political veiwpoint as liberal moderate
In a 1993 survey of 560 college students, 171 said that they used illegal drugs during the previous year. In a recent survey of 720 college students, 263 said that they used illegal drugs during previous year.
Calculate the standard error of estimate for the regression equation.
Find the probability that in a given year a) exactly one major hurricane will strike the U.S. mainland, b) at most one major hurricane will strike the U.S. mainland.
A manager of a small store wanted to discourage shoplifters by putting signs around the store saying "Shoplifting is a crime!" However, he wanted to make sure this would not result in customers buying less. To test this, he displayed the signs every ..
A scatterplot shows a set of data points that are clustered close to a line that slopes down to the right. Which of the following values would be closest to the correlation for these data?
how would you find the probability that one of several mutually exclusive events
A business invests $10,000.00 in a savings account for 2 years, At the beginning of the second year, an additional $3500.00 is invested, At the end of the second year, the account balance is $15,569.75. What is the annual interest rate?
The firm examined 35 randomly chosen fax transmissions during the next year, yielding a sample mean of 14.44 with a standard deviation of 4.45 pages.
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