Handout Assignment IV fall 11

Handout Assignment IV fall 11 - Assignment IV 1. 1. A...

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Assignment IV 1. 1. A manufacturing company is interested in predicting the number of defects that will be produced each hour on the assembly line. The managers believe that there is a relationship between the defect rate and the production rate per hour. The managers believe that they can use production rate to predict the number of defects. The following data were collected for 8 randomly selected hours. Defects Production rate/h 2 40 3 45 1 20 2 35 3 40 5 50 4 30 6 50 a. Set up a scatter diagram, and discuss what if any relationship appears to be present between two variables. b. Use the least-squares method to predict the number of defects when production rate is 60. c. Interpret the meaning of the regression coefficients in this problem. d. Compute the standard error of the estimate. e. Compute the coefficient of determination r² and interpret its meaning in this problem. f. At a significance level of .01 can you conclude that production rate is a good predictor of the number defects? g. Set up a 90% confidence interval estimate for average number of defects if the production rate was equal 60.
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2. Grinfield Service company’s marketing director is interested in analyzing the relationship
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This note was uploaded on 01/11/2012 for the course STATS 1305 taught by Professor Shahmai during the Spring '11 term at NYU.

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Handout Assignment IV fall 11 - Assignment IV 1. 1. A...

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