Assignment:
Q: Big Mountain Power Company serves a region in which the following amounts of electricity are used annually (in millions of kilowatt hours).
|
Year
|
Consumption
|
Year
|
Consumption
|
|
1999
|
352
|
2004
|
382
|
|
2000
|
357
|
2005
|
389
|
|
2001
|
362
|
2006
|
391
|
|
2002
|
369
|
2007
|
394
|
|
2003
|
380
|
2008
|
405
|
1. Plot the data.
2. Determine the regression equation and draw the line.
3. Forecast consumption for 2010 and 2011.
|
|
Low
|
Medium
|
High
|
Total
|
|
Homemaker
|
14
|
26
|
6
|
46
|
|
Blue Collar
|
16
|
42
|
16
|
74
|
|
White Collar
|
9
|
32
|
30
|
71
|
|
Professional
|
0
|
8
|
15
|
23
|
|
Total
|
39
|
108
|
67
|
214
|
Based on the above table
4. Find the probability that a person selected would:
a. Have a low income
b. Be a professional
c. Have a high incomed. Be a white collar worker
5. Using the method of least square regression, construct an equation for the estimated regression line and draw it.
You are conducting research into the reasons for the high turnover among lab technicians in a large pharmaceutical company. You have theorized the amount of job satisfaction is related to turnover, that is satisfied people tend to stay. You use a standardized survey to measure job satisfaction and are interested in whether there are significant differences between individuals working in palliative drugs (improving the quality of life for terminal patients) and those working in therapeutic drugs (drugs that may cure terminal diseases).
You break the satisfaction scores into four categories: high satisfaction, moderate satisfaction, moderate dissatisfaction, and high dissatisfaction and create a cross-tabulation with the departments in which the technicians work.
|
|
High Sat.
|
Mod. Sat
|
Mod Dissat.
|
High Dissat.
|
Total
|
|
Palliative
|
8
|
12
|
30
|
22
|
|
|
Therapeutic
|
12
|
24
|
16
|
13
|
|
|
Total
|
|
|
|
|
|
6. Is there a significant difference between these two areas?
7. What does it indicate about technicians satisfaction? Explain why you think this is.