Solved: Making Predictions. In Exercises 58, let the predictor variable x be the first

Chapter 10, Problem 5

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Making Predictions. In Exercises 58, let the predictor variable x be the first variable given. Use the given data to find the regression equation and the best predicted value of the response variable. Be sure to follow the prediction procedure summarized in Figure 105 Old Faithful For 40 eruptions of the Old Faithful geyser in Yellowstone National Park, duration times (sec) were recorded along with the timeintervals (min) after the eruptions. The linear correlation coefficient is r = 0.687 and the regression equation is y ^ = 47.4 + 0.180 x , where xrepresents duration time. The mean of the 40 duration times is 245.0 sec and the mean of the 40 interval times is 91.4 min. What is the best predictedinterval time following an eruption with a duration time of 120 min?