2201_Quiz2A_KEY

2201_Quiz2A_KEY - Revised 01/14/2010 2201_Quiz2A_KEY.docx...

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Unformatted text preview: Revised 01/14/2010 2201_Quiz2A_KEY.docx EXST 2201 Quiz 2A KEY Answers Tips 1A. Bell shaped 1B. 30 1C. 0.686 1D. 0.3859 1E. 0.8078 z0 = 30.2 − 30 = 0.29 0.686 z0 = 30.6 − 30 = 0.87 0.686 2A. 59.2 2B. 95% 1–0.05 = 0.95 2C. (58.3, 60.1) ⎞ 59.2 ± 1.65 ⎛ 3.8 ⎜ ⎟ 45 ⎠ ⎝ 2D. (58.4, 60.0) ⎞ 59.2 ± 1.65 ⎛ 3.8 ⎜ ⎟ 55 ⎠ ⎝ 2E. It becomes narrower. 3A. 2.093 t0.025,19 = 2.093 3B. distributed normally. 3C. (32.8, 37.4) ⎞ 35.1 ± 1.685 ⎛ 8.7 ⎜ ⎟ 40 ⎠ ⎝ 3D. (31.8, 38.4) ⎞ 35.1 ± 2.426 ⎛ 8.7 ⎜ ⎟ 40 ⎠ ⎝ 3E. becomes wider. Page 1 of 1 ...
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This note was uploaded on 05/20/2010 for the course EXST 2201 taught by Professor Mckenna during the Spring '08 term at LSU.

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