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hw3solu_STAT515Fall2011

hw3solu_STAT515Fall2011 - Homework#3(STAT 515-Fall 2011...

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Homework #3 (STAT 515-Fall 2011) 2.10. (8 points) a. The variable is “most salient role”. The categories are given in the first column of the table. b. Frequencies. c. V olun t ee r, c lub, c h ur c m ember S p ous e Provider Par en t O th er  r e lativ e H om em a k e r Gr andp ar e nt F r ien d 400 300 200 100 0 Most Salient Role Count Roles for Elderly d. Spouse. The relative frequency associated with this role is around 0.3848. This indicates that around 38.48% of the elderly people in the sample feel that the most important role is being a spouse. 2.15. (5 points) The Pareto chart below highlights that 50% of these CEO’s have MBA degrees. However, having a PhD does not seem to give one much advantage in terms of becoming a “rich CEO”. It is almost as good as having no degree. Except for MBA degree, the other more advanced degrees, such as a Master’s degree or a degree in Law, do not seem to help much either compared to having a Bachelor’s degree. Some students pointed out that having advanced degrees, such as PhD and Master’s degrees, should be helpful in regard to having a successful career. But the advantages may not show up in this particular example because of the mismatch of the field of business and the field of study at their graduate schools. (I like this argument.)
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Count 20 8 4 4 2 2 Percent 50.0 20.0 10.0 10.0 5.0 5.0 Cum % 50.0 70.0 80.0 90.0 95.0 100.0 DEGREE PhD None Masters Law Bachelor MBA 40 30 20 10 0 100 80 60 40 20 0 Count Percent Pareto Chart of DEGREE 2.17. (9 points) a. If one includes the missing data, the frequency/relative frequency table is given below. BIBLE1 Count Relative Frequency . 1472 0.5235 1 450 0.16 2 627 0.223 3 219 0.0779 4 23 0.0082 8 14 0.0050 9 7 0.0025 N= 2812 If one excludes the missing data, the table is given blow. Bin Frequenc y Relative Frequency 1 450 0.335821 2 627 0.46791 3 219 0.163433 4 23 0.017164 8 14 0.010448 9 7 0.005224 Total 1340 1
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b. Pie Chart of Responses (exclude missing data) 1, 34% 2, 46% 3, 16% 4, 2% 5, 1% 6, 1% 1 2 3 4 5 6 (Plot produced in Excel. Labels 5 and 6 in the plot refer to response 8 and 9, respectively.) c. Among those who answered the question, almost half of the respondents believed that
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