Calculate lambda for the table below:
News source and Social Class
|
|
Blue Collar
|
White Collar
|
Total
|
|
TV
|
120
|
20
|
140
|
|
Newspaper
|
30
|
80
|
110
|
|
Total
|
150
|
100
|
250
|
1. Find El:
2. Find E2:
3. Find lambda:
4. In at least one complete sentence, describe the association between news source and social class:
5. How strong is it? Weak Moderate Strong
6. How much does knowing a person's social class help us predict their main source of news? Please answer in a complete sentence.
Efficiency
Aptitude Test Scores
|
Ratings
|
Low
|
Moderate
|
High
|
|
Low
|
44.0%
|
24.0%
|
28.0% 32.0%
|
|
Moderate
|
36.0%
|
40.0%
|
36.0% 37.3%
|
|
High
|
20.0%
|
36.0%
|
36.0% 30.7%
|
|
|
100.0%
|
100.0%
|
100.0% 100.0%
|
All applicants for municipal jobs in Shinbone, Kansas arc given an aptitude test, but the test has never been evaluated to see if test scores arc in any way related to job performance. The following table reports aptitude test scores and job performance ratings for a random sample of 75 city employees.
First, looking at the table above, please answer the following questions:
1. Are these two variables associated? Yes No
2. Flow strong is the association? Weak Moderate Strong
3. What is the direction? Positive/direct Negative/inverse
A gamma of 0.219 was calculated for the table. Describe what that value tells us about the relationship between the variables by answering the questions below.
4. Discuss the strength and direction of the association:
5. Flow much does knowing aptitude test scores help us predict their efficiency? Please answer in a complete sentence.
6. Given the results of this analysis, in your opinion, should the aptitude test continue to be administered? Why or why not?