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How would you explain the analysis of variance, assuming that your audience has not had a statistics class before?
The researchers gave each subject a battery of nine separate neurological and psychological examinations designed to assess their mental capabilities.
Scores on an endurance test for cardiac patients are normally distributed with mean = 182 and standard deviation = 24.
Explain your findings (including the logic of comparing within-group to between-group population variance estimates, how each of these is figured, and the F distribution).
From her district, consisting of several hundred stores, she selects a random sample of 30 stores. For each store she gathered the following information.
How strong is the evidence against the company's claim? Based on these data, the P -value of the appropriate test
What is the smallest level of significance at which you could reject the null in favor of the alternative hypothesis?
A random sample of seven cars was selected; the cars were driven for two weeks without the booster and two weeks with the booster.
The shell thicknesses of the eggs produced by a large flock of hens follow approximately a normal distribution with mean equal to 0.38 mm and standard deviation equal to 0.03 mm. Find the 95th percentile of the thickness distribution.
According to the National Restaurant Association, 20% of fine-dining restaurants have instituted policies restricting the use of cell phones. From a sample of 100 fine-dining restaurants,
What is the probability that the sample mean would differ from the true mean by greater than .04 dollars if a sample of 183 5 gallon pails is randomly selected? Round answer to 4 decimal places.
If the standard deviation of the amount of coffee dispensed is 0.4oz and the amount of coffee dispensed is normally distributed.
Assuming that these results are sample data randomly selected from the population of all past and future Olympic games
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