Suppose that similar approach, using a20-item scale with 1-5 response options, w
ID: 2914432 • Letter: S
Question
Suppose that similar approach, using a20-item scale with 1-5 response options, was used to measure thejob stress of individuals for 15 randomly selected real estateagents, 15 architects, and 15 stock brokers. The stress levels ofthe three professions are given below:
Stress Level in Percent
Real Estate
Architect
Stockbroker
81
43
65
48
63
48
68
60
57
69
52
91
54
54
70
62
77
67
76
68
83
56
57
75
61
61
53
65
80
71
64
50
54
69
37
72
83
73
65
85
84
58
75
58
58
Using a = 0.05, test for any significantdifference in job stress among the three professions[Put the data in excel first.Then use Tools, Data Analysis function, one-factor ANOVA. Show allfive steps of hypothesis testing].See a model example in week 3 lecture - Rate of Returnsfor Utility, Retail and Banking.
B. Parametric and NonparametricData Identification Assignment
Label each of the following situations“P” if itis an example of parametric data or“NP” ifit is an example of nonparametric data.
1. In a comparison oftwo towns, is the average height of its residents the same?_____
2. A manufacturerproduces a batch of memory chips (RAM) and measures themean-time-between-failures (MTBF). The manufacturer then changes amanufacturing process and produces another batch and again measuresthe MTBF. Did the change to the process improve the MTBF?_____
3. The average life spanof a dog is proportional to the amount of calcium consumed._____
4. The correlationbetween gene disorders and certain diseases. _____
5. From a written surveywhere the respondents were asked to rate an individual on a scaleof 1 to 5, one group rated an individual a 3.7, another group ratedthe individual a 4.3. Is the difference statistically significant?_____
6. A study of vehicleaccidents on a military installation compared to drivers' rank._____
7. Show that the numbersdrawn in a state lottery are truly random. _____
8. There is a direct correlation to astudent's grade and the student's rating of an instructor.___
Stress Level in Percent
Real Estate
Architect
Stockbroker
81
43
65
48
63
48
68
60
57
69
52
91
54
54
70
62
77
67
76
68
83
56
57
75
61
61
53
65
80
71
64
50
54
69
37
72
83
73
65
85
84
58
75
58
58
Explanation / Answer
1. In a comparison oftwo towns, is the average height of its residents the same?____P_
2. A manufacturerproduces a batch of memory chips (RAM) and measures themean-time-between-failures (MTBF). The manufacturer then changes amanufacturing process and produces another batch and again measuresthe MTBF. Did the change to the process improve the MTBF?___P__
4. The correlationbetween gene disorders and certain diseases. ___NP__
6. A study of vehicleaccidents on a military installation compared to drivers' rank.___NP__
7. Show that the numbersdrawn in a state lottery are truly random. __NP___
8. There is a direct correlation to astudent's grade and the student's rating of an instructor.___NP
Anova: Single Factor SUMMARY Groups Count Sum Average Variance Column 1 15 1016 67.73333 117.6381 Column 2 15 917 61.13333 179.981 Column 3 15 987 65.8 137.1714 ANOVA Source of Variation SS df MS F P-value F crit Between Groups 345.3778 2 172.6889 1.191532 0.313814 3.219942 Within Groups 6087.067 42 144.9302 Total 6432.444 44Related Questions
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