# A teacher examines the relationship between quiz 1

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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

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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. 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. WHO:_______________ THEIR RESIDUAL IS: ___________________ d. Which student has scores that represent an influential point? Justify briefly. WHO:______________ WHY: 3. Suppose managers know that the average number of contacts they make with their clients is 10 per year. They also know the average number of sales per client per year is 652 units. Now they want to predict the number of sales using the number of contacts. Their analysis is below (n = 50). Coefficients Standard Error t Stat P-value Constant 302 43.4074727 15.0385889 5.9306E-21 Contacts 35.0008935 1.39830769 25.0308955 2.1802E-31 Correlation 0.92
Suppose each unit sold results in a profit of \$100. How much profit are you expected to earn
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