2201_Quiz1A_KEY

2201_Quiz1A_KEY - Revised 02/05/2010 2201_Quiz1A_KEY.docx...

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Unformatted text preview: Revised 02/05/2010 2201_Quiz1A_KEY.docx EXST 2201 Quiz 1A KEY Answers 1A. column a variable row an individual info in table body the data 1B. Body Style qualitative Weight continuous Number of Seats discrete 2A. Observational study 2B. Independent 2C. Without replacement 3. Experimental design Dependent Experimental units 36 college students Treatment Listening to Mozart and silence Response variable Test scores Answers Tips 4A. 0.025 rf = 118 4770 = 0.025 4B. 616 crf = 249+117+249 = 616 Answers 5A. 7.5% 5B. 3 million 6A. 215 6B. 10 6C. 100-110 6D. Symmetric 7A. 23 7B. 40, 88 Page 1 of 2 Revised 02/05/2010 2201_Quiz1A_KEY.docx Answers Tips 1862 8A. 266 i= 8B. 266 7 = 266 50 *7 = 3.5 100 8C. 260 8D. 25 8E. Sum of squares R = 282 – 257 = 25 426 Variance 71 σ 2 = 426 Standard deviation 8.43 σ = 71 = 8.43 ( 7 − 1) = 71 8F. They have the same spread. 9A. 6.15 i= 40 * 20 = 8.0 100 9B. {0.2, 6.05, 6.45, 6.95, 8.2} 9C. 0.90 IQR = 6.95 – 6.05 = 0.90 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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