HW 3 solution

# Ans 8747 c which values of machine time can be used

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ANS \$87.47 c. Which values of machine time can be used to make appropriate predictions for cost based on this data to avoid extrapolation? (include units) You can predict any time within the range of the data which is between 6 and 15 hours

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2. A teacher examines the relationship between Quiz 1 scores and Quiz 2 scores for her class. Her data and analysis are below. Use this information to answer the questions below. NAME Quiz 1 score Quiz 2 score Bob 1 2 Bob 1 2 Arun 2 3 John 2 4 Clint 4 5 Soma 5 5 Jamir 4 6 Sidney 10 10 Joe 2 9 James 3 4 Jillian 3 3 McKenn a 4 4 10 8 6 4 2 0 10 9 8 7 6 5 4 3 2 1 Quiz 1 score Quiz 2 score Scatterplot of Quiz 2 score vs Quiz 1 score
REGRESSION ANALYLSIS OUTPUT FOR QUIZ DATA Predictor Coef SE Coef T P Constant 2.2632 0.9714 2.33 0.042 Quiz 1 score 0.7279 0.2350 3.10 0.011 S = 1.89364 R-Sq = 49.0% R-Sq(adj) = 43.9% Quiz 1 vs. Quiz 2 scores Questions a. What is the equation of the regression line? Use proper labels and units. X=Quiz 1 Score Y=Quiz 2 Score b. What is the predicted value for Quiz 2 for someone who got a 5 on Quiz 1? ANS__________ c. Which student has data with the largest residual? Find the residual for that student. Include units.

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