HW04b_sol

# HW04b_sol - Homework 6 Solutions Problem 6-12 See the Excel...

This preview shows pages 1–2. Sign up to view the full content.

Homework 6 Solutions Page 1 of 4 Problem 6-12 See the Excel file (HW06_sol_X.xls) for backup calculations. A random sample of 20 observations was obtained by assigning a random number to each of the 140 samples (using Excel’s RAND()) and selecting the 20 samples with the lowest random number. See HW06_sol_X.xls /6-12_Additional for the sampling method and the full population results. Part A Direct Labor Cost vs. Copies Produced 0.0 1.0 2.0 3.0 4.0 0 100 200 300 400 500 Copies Produced Direct Labor Cost Part B The sample correlation coefficient is 0.867 Part C The fitted regression line is Direct Labor Cost = 0.83112 + 0.00500 * Copies Produced Part D See graph for fitted line (blue). Part E The standard error of estimate is 0.41413 Part F The coefficient of determination is 0.752 This implies that 75.2% of the total variation in y can be explained by the linear relationship between x and y. Part G To test for significance of the slope: H 0 : β = 0 H 1 : β 0 41413 . 0 x y s 00068 . 0

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

### Page1 / 4

HW04b_sol - Homework 6 Solutions Problem 6-12 See the Excel...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online