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Researcher A finds a significant relationship between increasing stress level and ability to concentrate. Researcher B replicates this study but finds a non-significant relationship. Identify the statistical error that each researcher may have made?
A random sample of 16 federal inmates is selected. What is the probability that exactly 12 are serving time for drug dealing?
a researcher is interested in whether students who attend private high schools have higher average sat scores than
Compute the optimal production quantities for the company?
the american veterinary association claims that the annual cost of medical care for dogs averages 100 with a standard
The top motivation is for using a credit card. Can you conclude that there has been a chagne in the claimed or expected distribution? Use a =0.025.
data from a psychology experiment were reported and analyzed in the american statistician may 2001. each student
Find a positive integer smaller than 500 that has a remainder of 3 when divided by 5, a remainder of 6 when divided by 9, and a remainder of 8 when divided by 11.
A general contractor is considering purchasing lumber from one of two different suppliers. A random sample of 12 "2x4's" of a certain length of each board is measured.
Determine the proportion of homes that have a pool. At the .05 significance level, can we conclude that less than 40 percent of the homes sold in the Denver area had a pool? What is the p-value?
there are 15 boys and 30 girls in class and 10 are to be randomly selected for special project. whats the probability
Find the probability that in a given month a) there are exactly 9 days with 0.01 inch or more precipitation, b) there are at most 9 days.
At the 0.05 level of significance, is there evidence that the mean amount in the bottles is different from 2.0 liters? Compute the ¬p-value and interpret its meaning.
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