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From Statistics and Data Analysis from Elementary to Intermediate by Tamhane and Dunlop, pg 161. A...

From Statistics and Data Analysis from Elementary to Intermediate by Tamhane and Dunlop, pg 161. A survey in a large metropolitan city found that the commuting times to work and time spent with the family on a working day are negatively correlated with r = −0.6. A person commutes one and one-half standard deviations longer than the average. How many standard deviations more/less would that person’s family time be predicted to be compared to the average? If the average family time is 60 minutes with standard deviation of 20 minutes, what is that person’s predicted family time?

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