HW 2 - Solutions

HW 2 - Solutions - STATISTICS 321 Homework Assignment 2...

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Unformatted text preview: STATISTICS 321 Homework Assignment 2 SOLUTIONS From the text: Section 1.2: 7, 8, 9, 15 Section 1.3: 2, 4, 6, 11, 12, 13, 14, 16 Section 2.1: 2, 4, 8, 10, 15, 16, 18 Section 2.2: 1, 4, 5, 8, 12 Section 1.2: 7. Yes. If all the numbers in the list are the same, the standard deviation will equal 0. 8. The mean increases by $50; the standard deviation remains the same. 9. The mean and standard deviation both increase by 5%. 1 Section 1.3: 2 6. a Skewed to the right b. Skewed to the left c. Approximately symmetric 3 14. a) false, b)true, c) false, d) false, e) true, f) false 16. (a) (4), (b)(2), (c)(1), (d)(4) Section 2.1: 8. (a) False, (b) True, (c) True, by definition 4 Section 2.2 1. (a) 4 x 4 x 4 = 64 (b) 2 x 2 x 2 = 8 (c) 4 x 3 x 2 = 24 5 ...
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