ec41w10MT1_A_key (2)

ec41w10MT1_A_key (2) - Prof. Bognar Midterm 1, Econ 41...

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Prof. Bognar Midterm 1, Econ 41 Alejandro Komai I. Multiple Choice Questions 1. a 2. b 3. c 4. c 5. d 6. d 7. d 8. a 9. b 10.c II. Short Answer Questions 11. Quantitative versus Qualitative a. quantitative, continuous b. qualitative c. quantitative, discrete (quantitative, continuous is also acceptable) d. quantitative, discrete e. quantitative, discrete 12. Electric bills class Frequency (a) Relative frequency (b) Percentages (b) [21,31) 3 1/10 = .1 10% [31,41) 5 1/6 = .1 6 16. 6 % [41,51) 8 4/15 = .2 6 26. 6 % [51,61) 5 1/6 = .1 6 16. 6 % [61,71) 5 1/6 = .1 6 16. 6 % [71,81) 4 2/15 = .1 3 13. 3 % c. 30% d. 26. 6 % e.
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Prof. Bognar Midterm 1, Econ 41 Alejandro Komai 13. Work experience a. Q1 = 6, Q2=9.5, Q3=13 b. sample mean = 130/12= 10.8 3 c. mode: 6, 11 14. Standard deviations, linear transformation a. I Data Deviations Dev 2 /(n-1) 18 -63/5 39.69 26 -23/5 5.29 14 -83/5 68.89 37 32/5 10.24 58 137/5 187.69 Σ 153 0 311.80 Sample standard deviation = 17.66 II Data Deviations Dev 2 /(n-1) 23 -63/5 39.69 31 -23/5 5.29 19 -83/5 68.89 42 32/5 10.24 63 137/5 187.69 Σ 178 0 311.80 Sample standard deviation = 17.66 b. They are equal. Note how the “Deviations” columns in the two tables are the same. This is no coincidence. Call Data Set I {x 1 , x 2 , x 3 , x 4 , x 5 , x
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ec41w10MT1_A_key (2) - Prof. Bognar Midterm 1, Econ 41...

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