Association for Continuous Data

Address the issue(s) involved below concisely and thoroughly:

1. Methods Plumbing Works (MPW) charged you a rate of $32 per hour plus a fixed one-time charge of $315.00 for fixing your bathtub. The total cost of fixing the bathtub depends on the number of hours it takes to complete the job.

a. Using the above information, find the straight line (regression equation) that expresses the total cost (Y) in terms of the number of hours (X) required to complete the job.

b. Using the equation (in question "1a" above) determine the total cost of fixing the bathtub, if it takes 10 hours for completing the job.

2. The US Postal Service is attempting to reduce the number of complaints made by the public against its workers. In order to facilitate this task, a staff analyst for the Service, using 348 cases (n = 348), regresses the number of complaints lodged against an employee last year (Y) on the hourly wage of the employee for the year (X). She obtains the following results.

= 10.2 - 1.9X; r = 0.73 r²= 0.53

Interpret the following (in relation to the scenario):

a. The value 10.2

b. The value -1.9

c. r (0.73)

d. r²(0.53)

e. At what level of wages can the employee be expected to receive zero (0) complaints?

3. What specific concepts or topics in this week's reading do you find most difficult,and if any, what measures did you take to make it more comprehensible?