Midterm Practice Problems

39 and the correlation between twitter time and

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Unformatted text preview: hours/day spent on facebook (m=3, sd = 1), hours/day spent on twitter (m = 1, sd = .3), and amount of money spent on tech products per year (m=1200, sd = 200). The correlation between facebook time and twitter time is .62, the correlation between facebook time and spending is .39, and the correlation between twitter time and spending is .45. a. What’s the covariance between facebook and twitter time? b. If you only used facebook to predict spending, what would the regression equation be? c. If you only used twitter to predict spending, what would the regressio...
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This document was uploaded on 03/14/2014 for the course STAT 2215Q at UConn.

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