# [Solution]The Y Intercept

The following problems are from the above textbook Chapter 13  for this course as Discussion Questions assignment for week eight:  You can use any source. …

The following problems are from the above textbook Chapter 13  for this course as Discussion Questions assignment for week eight:  You can use any source.

1.        13.1 Fitting a straight line to a set of data yiedls the following prediction line:   Y, = 2 + 5 Xi
a.  Interpret the meaning of the Y intercept, bo.
b.  Interpret the meaning of the slope, b1.
c.  Predict the value fo Y for X = 3.
2.        Following data is amount of advertising an organization spent for sales.  The second column represents the resultant sales.  Use excel to ….
a.       Obtain a Scatter plot of advertsing as the independent and sales as the dependent variable.
b.       Note the linear regression Model
c.       Predict the amount of sales for \$2000 advertising commercial.

(\$’000)
Sales (\$’000)

1068
4489

1026
5611

767
3290

885
4113

1156
4883

1146
5425

892
4414

938
5506

769
3346

677
3673

1184
6542

1009
5088

3.        Analysis of Variance
Is there a statistical significance difference between the five supervisors?  How about the different shifts? (conduct an analysis of variance using excel to determine this problem. Make sure you conuct a full fledge eight step hypotheis test for both supervisors and shifts.)

Day Shift
Evening Shift
Midnight shift

Joe
22
21
23

Bil
23
26
33

Robert
24
25
32

Sally
32
24
42

Zoe
35
29
39

For the supervisors:
3a  What will be your Ho?
3c  What is your level of significance?
3d  What is your test statistics?
3e  Why did you use the specific test statistics?
3f  What is your decision rule?
3g  Do your excel statistical print out
For the Shifts:
3a  What will be your Ho?