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Solved: Regression and Predictions. Exercises use the same

Chapter 10, Problem 14BSC

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QUESTION:

Regression and Predictions. Exercises 13–28 use the same data sets as Exercises 13–28 in Section 10­-2. In each case, find the regression equation, letting the first variable be the predictor (x) variable. Find the indicated predicted value by following the prediction procedure summarized in Figure 10­-5.

PSAT and SAT Scores One subject not included in the given table had a PSAT score of 229. Find the best predicted SAT score for this student. Is the result close to the reported value of 2400? Given that the data are from volunteered responses, are the results valid?

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QUESTION:

Regression and Predictions. Exercises 13–28 use the same data sets as Exercises 13–28 in Section 10­-2. In each case, find the regression equation, letting the first variable be the predictor (x) variable. Find the indicated predicted value by following the prediction procedure summarized in Figure 10­-5.

PSAT and SAT Scores One subject not included in the given table had a PSAT score of 229. Find the best predicted SAT score for this student. Is the result close to the reported value of 2400? Given that the data are from volunteered responses, are the results valid?

ANSWER:

Answer :

Step 1 0f 1 :

Given, the data of SAT and PSAT scores

PSAT

SAT

183

2200

207

2040

167

1890

206

2380

197

2290

142

2070

193

2370

176

1980

The claim is to find the indicated prediction value.

The regression equation is given by,

  = a + bx

Where, a =

           b =

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