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Find the indicated probabilities using the geometric distribution or poison distrubution. Then determine if the events are unusual, if convenient use the pioson probability table or technology to find the probabilities. A major hurricane is a hurricane with a wind speed of 111 miles per hour or greater. During the last century, the mean number of major hurricanes to strike a certain countries mainland per year was about 0.69. Find the probability that in a given year.
(a) Exact one major hurricane will strike the mainland
(b) At most one major hurricane will strike the main land
(c) More that one major hurricane will strike the mainland
Suppose that it is important to demonstrate that the wall thickness exceeds 4.0 mm. Test appropriate hypotheses using these data. Draw conclusions at α= 0.05.
a bridge culvert is designed to pass a stream discharge with an annual exceedance probability of 0.02 without
What sample size is recommended for the hypothesis test (0 decimals)? Use 30 hours as an estimate of the population standard deviation.
Determine the probability that: a) Exactly 3 will have this mild side effect.
as an occupational health epidemiologist you are required to measure the effect of stress on the workers in your
The producers of a new toothpaste claim that it prevents more cavities than other brands of toothepaste. A random of 60 people used the new toothpaste for 6 months.
suppose that we have a sample space s e1 e2 e3 e4 e5 e6 e7 where e1 e2 . . . e7 denote the sample points. the
Shoppers enter Hamilton Place Mall at an average of 120 per hour, and the number and shoppers is Poisson distributed. What is the probability that at least 5 shoppers will enter the mall between 5:00 and 5:05 p.m.?
Explain how we test independent against dependent variables in a regression analysis? What's the set up? How are regression analyses often misused / misinterpreted at work or in the news? Cite an example.
A box contains four 40-W bulbs, five 6-W bulbs and six 70-W bulbs, if three bulbs are selected without replacement randomly. What is the probabilty that three are 70-W bulbs?
At the .10 significance level, can we conclude that there is a difference in the length of time the two types of treatment lasted?
Using one mean t test to determine whether or not to support the claim - hypothesis test that WORKS THE SAME as the z-test
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