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A history instructor has given the same pretest and the same final examination each semester for several years. He is interested in determining if there is a relationship between the scores of the two tests.
a. He computes the linear correlation coefficient and notes that r = 1.14. What does this correlation coefficient value tell the instructor?
b. A Mathematics instructor is also curious and conducts the same research using pretest and final results. In the case the instructor obtained an r = .82 What does this tell the instructor?
a selection of cereals was sampled and the number of calories was plotted against the number of grams of protein with
a report states that 40 of home owners had a vegetable garden. how large a sample is needed to estimate the true
The modulus of elasticity and mass per unit volume of steel are 200 x 109 IsUm2 and 7810 kg/m3, respectively.
a. GM(z), the z-transform of the PMF of M, which is the total number of people arriving at the restaurant in an arbitrary hour
a deck of 52 cards is shuffled and a bridge hand of 13 cards is dealt out. let x and y denote respectively the number
FBI Report Do greater universities tend to have more property crime, would you speek that the correlation is low, moderate or high
according to the internal revenue service the mean tax refund for the year 2013 was 3000. assume the standard deviation
you interview 100 people about who their favorite rock band is. of those 100 80 replied that their favorite band is
1. Which of the following are valid probability density functions? Justify your answer.
Either you marry me right now or I'll be forced to leave you and never speak to you again. I'm sure you wouldn't want me to do that.
Run an analysis of variance by estimating the missing value. Use a = .05. Make treatment comparisons by using Fisher's least significant difference, with a = .05.
How might one know if an error was made in accepting or rejecting the null hypothesis? Do you suppose the nature of the research has an influence on the selection of the significance level? Why or why not?
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