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A researcher wishes to test the effectiveness of a flu vaccination. 150 people are vaccinated, 180 people are vaccinated with a placebo, and 100 people are not vaccinated. The number in each group who later caught the flu was recorded. The results are shown below.
Vaccinated
Placebo
Control
Caught the flu
8
19
21
Did not catch the flu
142
161
79
Find and interpret the relative risk of catching the flu, comparing those who were vaccinated to those in the control group.
If researcher obtains sample mean of M = 88, which combination of factors is most likely to result in rejecting null hypothesis?
assume you are in charge of a production line which allows for no more than 1 defectives in order to be in compliance.
a computer manufacturer is introducing a new product specifically targeted at the home market and wishes to compare the
Jamie expects that a bulb will last for 400 to 500 days, what is the probability of an Acme bulb satisfying that?
the salinity in the ocean is expressed in parts per thousand ppt. during november 2008 the mean salinity in a region of
Your director has banned the use of all artificial fingernails, claiming their use contributes to patient infections in the unit. After multiple discussions the director has allowed you to do a research study to determine if the use of artificial ..
The personnel director of Cander Machine Products is investigating perfectionism on the job. A test designed to measure perfectionism was administered to a random sample of 18 employees.
The distribution of bladder volume in women is approximately N(400,75) in milliliters. Find the proportion of women's bladders with a volume between 500 and 600m.
a discrete random variable x can assume 5 possible values 2 4 6 7 and 9. its probability distribution is shown
in a recent study 90 percent of the homes in the united states were found to have tvs. in a sample of nine homes what
Exercise on Inventory Pricing
A sample of 4 different calculators is randomly selected from a group containing 42 that are defective and 27 that have no defects. what is the probability that all four of the calculators selected are defective?
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