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In a sample of 587 customers, 308 say they are happy with the service. If you select three customers without replacement for a commercial, what is the probability they will all say they are happy with the service?
An article reports that when each football helmet in a random sample of 44 suspension-type helmets was subjected to a certain impact test, 25 showed damage.
What type of test is needed to analyze the data? What is the hypotheses (including the symbols used to state the hypothesis)?
The information that the distribution of the serve speeds was bell shaped. What proportion of the player's serves are expected to be between 107 mph and 118 mph?
Suppose that the incidence of MI is 0.005 per year among subjects who are actually take placebo and that aspirin prevents 20% of MIs
Using ANOVA, determine if there is a significant difference in the six year graduation rate by type.
A number of probabilistic, physical models of the process of fatigue damage have been proposed in the literature. Each leads to a different distribution
over the last five years in pa. the variance of new home construction costs has been 108000. over the same period of
What is the required sample size if you need to estimate the number of workers in the United States who are highly satisfied with their job and you want the estimate to be within 2 percentage points of a 96% confidence interval.
a survey is taken in which 40 randomly selected respondents aged 25-40 are asked how many biological children they
two airplanes are flying in the same direction in adjacent parallel corridors. at time t 0 the first airplane is 10 km
A researcher wants to determine a 99% confidence interval for the mean number of hours that adults spend per week doing community service.
Why might it not be a good idea to take the log of Hbath? Also generate a variable equal to the age of the house - how many valid observations do you have? Briefly explain why you will have exactly 6 fewer observations to use in estimating model
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