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What information is provided by the sign (= or -) of the Pearson correlation?
What information is provided by numerical value of the Pearson correlation?
What is the major distinction between the Pearson and Spearman correlations?
A professor obtains SAT scores and freshman grade point averages (GPAs) for a group of n=15 college students. The students scores have a mean of m=580 with SS=22,400, and the GPAs have a mean of 3.10 with SS=1.26, and SP=84.
a. Find regression equation for predicting GPA from SAT scores.
P-value to test hypotheses,
As a manager of an organization, what statistics would you use and why if you wanted to estimate your annual employee turnover? Be sure to specifically identify the statistical formulas and what additional data you would need to determine your est..
A psychology professor is interested in whether implementing weekly quizzes improves student learning. She decides to use the weekly quizzes in one section of her introductory psychology class and not to use them in another section of the same cou..
The number of viewers of American Idol has a mean of 29 million with a standard deviation of 5 million. Assume this distribution follows a normal distribution.
Test whether there is difference in the two population mean. Use p-value approach
2 to every even-numbered card, with aces being 1s. Determine the frequencies of 0, 1, and 2. Use SPSS to get the value of test statistic and p-value.
It is believed that students who begin studying for final exams a week before the test score differently than students who wait until the night before. Suppose you want to test specifically that students who study earlier have an average score tha..
The variable recorded for each subject was the number of additional yards (possibly negative) that the subject could drive the ball by the end of the season. In the two-way ANOVA the DFM
Suppose that verbal scores on SAT exam have a normal distribution with a population mean 500 points and population standard deviation of 100.
Flu cases this past season in the Oshkosh school system were about 15 per week. For the entire state, the weekly average is 16 and the standard deviation, 2.35.
The City Transit Authority plans to hire 8 new bus drivers. From the group of 100 qualified applicants, of whom 55 are men and 45 are women, 8 names are to be selected by lot. Suppose that Mary and John Lewis are among the 100 qualified applicants..
One of the major measures of the quality of service provided by any organization is the speed with which responds to customer complaints. A large family-held department store selling furniture and flooring, including carpet, had undergone a major ..
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