Question: In testing eight value notebook computers PC World reported various

In testing eight value notebook computers, PC World reported various physical and performance measures of each. Data included overall rating, street price, PC WorldBench 4 performance score, and battery life, with the results shown here.
a. From these data, obtain the multiple regression equation estimating overall rating on the basis of the other three variables; then determine and interpret the approximate 95% confidence interval for the mean overall rating of notebook computers having a $1000 street price, a performance score of 100, and a 2.50-hour battery life.
b. Determine the 95% prediction interval for the overall rating of an individual notebook computer with a $1000 street price, a performance score of 100, and a 2.50-hour battery life.


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  • CreatedSeptember 08, 2015
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