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A study is run to estimate the association between exposure to lead paint in childhood and attention-deficit hyperactivity disorder (ADHD). Data on n = 400 children are collected and data on exposure and ADHD diagnosis are shown below.
Exposure to Lead Paint
ADHD
No ADHD
Yes
34
71
No
29
266
A. Estimate the crude or unadjusted relative risk.
B. Estimate the crude or unadjusted odds ratio.
The study found that men who had participated in some vigorous activity at least twice a week in high school, college, and up to age 40 had a 60% reduced risk of Parkinson's disease developing. The study found no such reduction for women. What typ..
in constructing a confidence interval for the mean the z distribution provides a result nearly identical to the t
Household with no children that is equal to the value obtained by the census. Give the z statistic (rounded to two decimal places) and the P-value. What do you conclude? (Use (alpha) = 0.10.) z = ? P-value =?
A customer from Cavallaro's Fruit Stand picks a sample of 5 oranges at random from a crate containing 80 oranges, of which 6 are rotten. What is the probability that the sample contains 1 or more rotten oranges? (Round your answer to three decimal..
Just as we had 3 versions of the t-test
table given below presents the number of surface finish defects in the primer paint found by visual inspection of
A 6-sided die is rolled and depending on the result a ball is then chosen from one of three boxes. If the roll results in a 1 a ball is drawn from box A
suppose that the middle 68 of families of a certain demographic monthly food expenditures fall between 293.45 and
regression anaylsis was applied between demand for a product y and the price of the product x and the following
the office of president vice president secretary and treasurer for an environmental club will be filled from a pool of
A shipment of 10 items has two defective and eight nondefective items. In the inspection of the shipment, a sample of items will be selected and tested. if a defective item is found the shipment of 10 will be rejected.
if you have four similar elements in active parallel with a time to failure density function of ft0.005e-0.005t what is
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