It is known that the standard deviation of the marks of a certain Mathematics exam is 2.4. For a sample of 36 students, an average grade of 5.6 was obtained. Do these data serve to confirm the hypothesis that the mean exam grade was 6, with a confidence level of 95%? A sociologist has predicted that in a certain city, the average level of abstention in the next elections will be at least 40%. A random sample of 200 individuals is randomly selected, with the right to vote, where only 75 of whom would be willing to vote. Determine with a significance level of 1%, if the forecast can be admitted, when the standard deviation is 1.5.

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A: *Answer:

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Q: Suppose population 1 is all blue cars sold at used car auctions, and the mean sale price of all such…

A: Given information: μ1=24579, σ1=3691, n1=47μ2=21948, σ2=4028, n2=59

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