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Jim decides to find a sample of 50 students (n = 50) in his high school. He finds a sample mean of 48.7 gallons. He sees that this is lower than the average, but Jim is interested in determining how rare this sample is, given the nationwide average. You can help him determine this by calculating the following probability: What is the probability of Jim collecting a sample mean from those 50 students that is less than or equal to 48.7 gallons?
An automobile assembly line operation has a scheduled mean completion time of 2.2 minutes. Because of the effect of completion time on both preceding and subsequent assembly operations, it is important to maintain the 2.2 minute mean completion ti..
State the hypotheses for a right-tailed test. Obtain a test statistic and p-value assuming unequal variances. Why might the sample data not follow a normal, bell-shaped curve? If not, how might this affect your conclusions?
in a recent study researchers followed 104000 u.s. veterans who had served in the armed forces and a comparison group
Find the 90% confidence interval of the true mean weight of all college wrestlers. If a coach claimed that the average weight of the wrestlers on the team was 310, would the claim be believable?
blood pressure is a measure of the blood force against the walls of the arteries. the larger value represents the
What is the type of test of significance? 2. Indentify the null and alternative hypothesis. 3. which hypothesis is the claim? 4.What's the test statistic?
What is the probability of observing no successes among the ten treatments? What is the probability of observing 9 or more successes?
Use this information to construct a probability table, and then calculate each of the following probabilities:
describe the direction of the relationship between the hamstring strength index 60degs and the shuttle run test.
Compute the two forecasts by using MAPD and indicate which seems to be more accurate.
a shell oil company executive says that a majority of workers more than 50 prefer a 10 hour four day work week over an
although the phenomenon is not well understood it appears that people born during the winter months are slightly more
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