2201_Quiz2B_KEY

2201_Quiz2B_KEY - Revised 01/19/2010 2201_Quiz2B_KEY.docx...

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Unformatted text preview: Revised 01/19/2010 2201_Quiz2B_KEY.docx EXST 2201 Quiz 2B KEY Answers Tips Answers 1A. All of the above. 3A. t-Test of the mean. 1B. 1.65 . = 1.65 3B. µ = 0.16 1C. 2.58 . = 2.58 3C. µ > 0.16 1D. –1.18 z0 = 47.1 − 50 12 24 t0 = 3D. Reject the null. 107 − 100 34 49 1E. Do not reject the null. 2A. s known, σ unknown 2B. +1.44 2C. 1.753 t0.05 1 2D. +1.143 t0 = ,15 = 1.753 77 − 75 7 16 2E. Do not reject the null. Page 1 of 2 Tips Revised 01/19/2010 Answers 2201_Quiz2B_KEY.docx Tips 4A. t-Test of the mean 4B. µ = 220, µ ≠ 220 4C. 2.921 4D. +2.11 t0.01 2 t0 = ,16 221.24 − 220 2.42 17 4E. 0.050 0.025*2 = 0.05 4F. (219.5, 222.9) ⎞ 221.24 ± 2.921 ⎛ 2.42 ⎜ ⎟ 17 ⎠ ⎝ 4G. Do not reject the null. 4H. No. Do not reject the null. 5A. None of these. 5B. Yes 5C. Sometimes. 5D. Sometimes. 5E. Does not exist. 5F. Depends on whether the test statistic is z or t. Page 2 of 2 ...
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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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