Question

In: Statistics and Probability

Retrenched Auto Body management wonders if the satisfaction rate (in %) of their customers depends on...

Retrenched Auto Body management wonders if the satisfaction rate (in %) of their customers depends on the length of time it takes to repair the automobile (in weeks). They arbitrarily keep one car for one week, another car for two weeks, another for three, and still another for four weeks, and then have the cars’ owners report their percentage level of satisfaction. Ignoring history or other test effects, determine the following:

Customer

Repair time (weeks)

Satisfaction (%)

Repair-time squared

Satisfaction

squared

Repair-timeX satisfaction

Randy

1

60

1

3600

60

Theo

2

55

4

3025

110

Kaylene

3

30

9

900

90

Al

4

15

16

225

60

sum

10

160

30

7750

320

average

2.5

40

7.5

1937.5

80

  1.         Compute (numerically) and interpret (in words) the correlation between satisfaction and           repair time
  1.         Estimate the regression function between satisfaction and repair time
  1.         If they kept a car for six weeks, what satisfaction level would the regression function predict?

Solutions

Expert Solution

Answer:-

Page one

Calculations::

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Page three

Thanks dear student


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