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On average, 3 percent of all persons who are given a breathalyzer test by the state police pass the test (blood alcohol under 0.08 percent). Suppose that 400 breathalyzer tests are given.
(a) What is the expected number who pass the test? (Round your answer to the nearest whole number.)
Expected number 12
(b) What is the approximate Poisson probability that 5 or fewer will pass the test? (Round your answer to 4 decimal places.)
in the linear regression model it was found that the 90 confidence interval for the regression coefficient b is 1.59.3.
The number of text messages that Debbie's son Jeff sends and receives a month follows the normal distribution with a mean of 4,580 (I am not making this up!) and a standard deviation of 550. What is the probability that next month he will send and..
ANCOVA allows us to assess the differences in group means while controlling for other variables. The reason(s) why it is useful to control for other variables is/are it and How would you interpret a correlation coefficient of -1
Decision analysis can be used on itself! What do you want to accomplish in studying decision analysis? Why is decision analysis important to you? In short, what are your fun damental objectives in studying decision analysis?
1. the response to a question has three alternatives a b and c. a sample of 120 responses provides 60 a 24 b and 36 c.
Twenty percent of U.S. mortgages are "underwater" (The Boston Globe, March 5, 2009). A mortgage is considered underwater if the value of the home is less than what is owed on the mortgage. Suppose 100 mortgage holders are randomly selected.
a population has mean 20. a simple random sample of size 100 is selected from this population. what is the mean of the
After you meet with Kathy, she still refuses to attend the classes, so you decide to provide her with a pamphlet that will provide education on pregnancy self-care and newborn care essentials.
In 2009, it was reported that 48% of teens found texting while driving very distracting. Test the hypothesis that there has been a rise in this proportion since 2009 using the α = 0.05 significance level.
Think of some of the factors in the study. How are they controlled?
question following are the scores on a teacher certification test administered prior to hiring x and the principals
How much better are the workers at one plant compared to another? How much "better" is line 1 of variety A compared to line 2 of variety C?
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