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Final Exam Stats Review.doc

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Department
Quantitative Methods
Course
QMS 102
Professor
Changping Wang
Semester
Fall

Description
Business Statistics (QMS102) NOTE: Questions 1-5 are based on the following data in Table B: The “Household expenditures, by selected metropolitan area: (Halifax, Saint John)” data that was published by Statistics Canada. Table 1- Household expenditures, by selected metropolitan area (Halifax, Saint John) 2007 Halifax Saint John Expenditures per Expenditures per household household $ $ Food 7,198 7,073 Shelter 13,337 11,745 Household Operation 3,547 3,138 Household furnishing 2,055 1,541 and equipment Clothing 2,936 2,717 Transportation 9,357 10,745 Health care 1,903 2,044 Personal care 1,232 1,011 Recreation 3,989 3,458 Reading materials and 277 224 other printed matter Education 1,605 981 Tobacco products and 1,692 1,471 alcoholic beverages Games of chance (net 232 157 amount) Miscellaneous 1,071 1,007 Personal income taxes 13,848 14,198 Personal insurance 4,236 4,351 payments and pension contributions Gifts of money and 2,446 1,388 contributions Source:Statistics Canada, CANSIM, table (for fee) 203-0001 and Cataogue no. 62F0026MIE Last modified: 2008-12-22 Page 1 Question 1 The coefficient of variation for “the expenditures per household living in Halifax’’ is a) 98% b) 102% c) 110% d) 91% e) None of the above Question 2 The coefficient of variation for “the expenditures per household living in Saint John’’ is a) 98% b) 102% c) 110% d) 91% e) None of the above Question 3 Which city has relatively more varied expenditures per household: Halifax or Saint John? a) Halifax b)Saint John c) Both have the same amount of variability d) All of the above e) None of the above Question 4 Which measures of central tendency would be a better measure, mean of median, to represent the data on the “the expenditures per household living in Halifax ’’? a) mean b)median c) both mean and median d) neither mean nor median e) None of the above Question 5 What would you say that the distribution of the data on the “the expenditures per household living in Halifax’’? a) skewed left Page 2 b) skewed right c) symmetric d) All the above e) None of the above For question 6, refer to Table E: Marriages by provinces and territories that is published by Statistics Canada. Table E: Marriages by Province and territory Number of Marriages 2004 2005 2006 2007 2008 Newfoundla 2,850 2,806 2,752 2,698 2,797 nd PEI 827 829 828 831 824 Nova Scotia 4,729 4,698 4,667 4,633 4,687 New 3,708 3,686 3,646 3,622 3,669 Brunswick Quebec 21,279 22,244 21,900 22,650 22,400 Ontario 64,114 64,677 65,170 65,483 64,959 Manitoba 5,710 5,732 5,746 5,796 5,767 Saskatchew 5,011 5,000 4,995 5,080 5,080 an Alberta 17,909 18,392 19,060 19,837 19,100 British 22,080 20,007 20,660 20,697 20,770 Columbia Yukon 160 159 160 158 161 Northwest 141 140 138 139 138 Terrotories Nunavut 67 69 70 71 71 Source: Statistics Canada, CANSIM, table (for fee) 053-0001 Last Modifed: 2009-06-23 Question 6 For 2006, which province has the 33 percentile of number of marriages? a) Yukon b) Newfoundland c) Prince Edward Island d) Northwest Territories e) None of the above NOTE: Questions 7 to 17 are based on the following data. Blood cocaine concentration (mg/L) was determined both for a sample of individuals who had died from cocaine-induced excited delirium (ED) and for a sample of those who had died from a cocaine overdose Page 3 without excited delirium (non-ED); survival time for people in both groups was at most 6 hours. The accompanying data comes from “Fatal Excited Delirium Following Cocaine Use” (J. of Forensic Sciences, 1997: 25-31). Non-ED: 0.0, 0.0, 0.0, 0.0, 0.0, 0.1, 0.1, 0.1, 0.1, 0.2, 0.2, 0.2, 0.3, 0.3, 0.3, 0.4, 0.5, 0.5, 0.6, 0.8, 0.9, 1.0, 1.2, 1.4, 1.5, 1.7, 2.0, 3.2, 3.5, 4.1, 4.3, 4.8, 5.0, 5.6, 5.9, 6.0, 6.4, 7.9, 8.3, 8.7, 9.1, 9.6, 9.9, 11.0, 11.5, 12.2, 12.7, 14.0, 16.6, 17.8. ED: 0.0, 0.0, 0.0, 0.0, 0.1, 0.1, 0.1, 0.1, 0.2, 0.2, 0.3, 0.3, 0.3, 0.4, 0.5, 0.7, 0.8, 1.0, 1.5, 2.7, 2.8, 3.5, 4.0, 8.9, 9.2, 11.7, 21.0. Help a medical expert to construct a box-whisker plot for the cocaine- induced excited delirium (ED) data by stating the value of each of the following: (If necessary, round your answer to one decimal place. All answers are in mg/L) Question 7 The mean is a) 4.3 b) 2.6 c) 0.4 d) 1.6 e) None of the above Question 8 Use the method of the recommended (i.e. Casio or TI or Sharp) calculator to obtain the first quartile. a) 0.0 b) 0.2 c) 0.3 d) 0.1 e) None of the above Question 9 Use the method of the recommended (i.e. Casio or TI or Sharp) calculator to obtain the third quartile. a) 7.9 b) 2.8 c) 3.1 d) 9.0 e) None of the above Question 10 The median: a) 0.4 b) 1.6 c) 6.2 Page 4 d) 7.6 e) None of the above Question 11 The interquartile range: a) 7.6 b) 4.5 c) 2.7 d) 6.4 e) None of the above Question 12 The right inner fence: a) 20.8 b) 6.9 c) 19.3 d) 14.9 e) None of the above Question 13 The right outer fence: a) 30.5 b) 26.2 c) 30.7 d) 10.9 e) None of the above Question 14 The smallest value on the left whisker (i.e. the left whisker ends at what value): a) 0.0 b) 0.1 c) - 4.0 d) - 8.0 e) None of the above Question 15 The largest value on the right whisker (i.e. the right whisker ends at what value): a) 17.8 b) 11.5 c) 4.0 d) 10.5 e) None of the above Question 16 State the value of each outlier: a) None (No Outlier value) b) 8.9 c) 9.2 d) b and c e) None of the above Page 5 Question 17 State the value of each extreme: a) 11.7 b) 21.0 c) a and b d) None (No extreme value) e) None of the above Question 18 In a survey the respondent is asked to report the postal code of where s/he is living. The scale of measurement used is: a) Nominal b) Interval c) Ratio d) Ordinal e) None of the above Question 19 A questionnaire asks the respondent how many children s/he intends to have. The scale of measurement for this question is: a) Nominal b) Interval c) Ratio d) Ordinal e) None of the above Question 20 In a survey the respondent is asked to rank a movie star: 1 = strongly dislike, 2 = dislike, 3 = neutral, 4 = like, 5 = strongly like. The scale of measurement used is: a) Nominal b) Interval c) Ratio d) Ordinal e) None of the above Question 21 What is your current browser? IE 4.0 or higher Older than IE 4.0 Page 6 Netscape 4.0 or higher Older than Netscape 4.0 None of the above Refer to the question above being asked on the survey form by Ryerson University. What is the measurement scale of the response data? (a) Ordinal (b) Interval - Continuous (c) Ratio – Discrete (d) Ratio – Continuous (e)Nominal Question 22 For the date set with L=3.30 and H=3.68, which of the following could be the last class of the frequency distributions? a) 3.60 and under 3.70 b) 3.65 and under 3.70 c) 3.60 and under 3.80 d) 3.30 and under 3.35 e) None of the above Note: Questions 23 and 24 are based on the following data. The following stem-and-leaf display shows the number of text messages sent last month by the 50 cellular phone users on one floor of a college dormitory. The number of text messages sent last month Page 7 Stem (tens) Leaf 8 8 9 10 5 6 6 8 9 9 9 11 2 2 2 3 4 5 6 7 8 8 8 9 9 9 12 1 1 2 2 2 3 4 4 6 6 6 6 6 9 13 0 2 3 3 4 9 9 14 0 2 4 5 5 7 8 Question 23 If you were to make a frequency distribution, what would be the upper boundary of the first class? a) 85 b) 95 c) 90 d) 100 e) None of the above Question 24 If you were to make a frequency distribution, wha
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