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Lipitor is a cholesterol reducing drug. In clinical trials, 94 subjects were treated with the drug and 200 were given a placebo. In the 94 subjects that received the treatment, 8 developed infections while in the placebo group of 200 there were 12 that developed infection. At \alpha=.05, is there a greater risk of infection from using Lipitor? Assume that P1 is the Percentage of Lipitor users that developed infection. Test the hypotheses and compute the p-value rounded to 4 decimal places.
1.i want to know which of two manufacturing methods will be better. i create 10 prototypes using the first process and
Bill heats his house with natural gas. The gas usage is measured in therms (T). In January of 2007 he used 125 therms over 34 days (D) and the average temperature (T) was 49 degrees farenheit.
Sarah is a 60 year old Anglo female in reasonably good health. She wants to take out a $50,000 term life insurance policy until she is 65.
Calculate the sample correlation coefficient by hand. By use of a spreadsheet calculate the sample correlation coefficient.
the average number of vacation days per year offered by different us companies is skewed to the right. a random sample
A jar contains 2 black marbles and 8 white marbles. If you randomly pick 2 marbles without replacement, what is the probability that you get one marble of each color?
assume that there are nine parking spaces next to one another in a parking lot. nine cards need to be parked by an
Airlines must be careful about the total weight of baggage carried by a plane on a commercial flight. Passengers with items exceeding the maximum single-item weight (usually about 70 pounds) must pay a fee
when circuit boards used in the manufacture of compact disc players are tested the long-run percentage of defectives is
jason has several shirts pants and shoes that he can mix and match to create 48 different uniform combinations. what
At the 5% level of significance, can we infer that the difference in the level of satisfaction with service between the two branches is wider than 5 p.c. points?
She surveys 100 randomly selected families and finds the mean income to be $96,321 with a standard deviation of $9555.With a0.05, is she correct?
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