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Suppose that a researcher does a study to see how level of anxiety (A1 = low, A2 = medium, A3 = high) is used to predict exam performance (Y). Would it be appropriate to do a Pearson correlation (or linear regression) between Anxiety, coded 1, 2, 3 for (low, medium, high) and exam score? Why or why not?
A radio station wants to know if residents in their area are in favor of a proposed tax increase. They invite listeners to call in to respond to the poll. 645 of the 800 who responded were against the tax.
At the 5 percent level of significance, does this sample prove a violation of the guideline that the average patient should pay no more than $250 out-of-pocket? State your hypotheses and decision rule.
Based on these results, the proportion of the variation in 1993 winnings that is explained by the average number of putts per round and driving distance
Find the probability that in a given month:
What is the probability that a respondent said neither the Big Ten nor the Pac-10 would have a team in the Rose Bowl?
Suppose we wish to test the null hypothesis that there are no differences among the proportion of men and women who developed a rash. Evaluate the P-value of the chi-square test of this hypothesis.
In a regression model involving 30 observations, the following estimated regression equation was obtained:
If code is 4 random letters, and letters can be utilized multiple times, how many different possible codes are there?
Students are the University of New Harmony received 10, 000 course grades last semester. The table below breaks down these grades by which school of the university taught the course.
Conduct a marketing experiment in which students are to taste one of two different brands of soft drink
Find the probability that a randomly selected employee earns less than $5.43.
An experiment was performed to investigate lifetime of a component exposed to high heat. Three different oven types were used at either 550°F or 600°F.
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