UO - MATH - Study Guide - Midterm

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Unformatted text preview: 243 certain outumes: BI S - when a sample systematically favors cautions - (methods to get bias) n undercoverage - we our samples leave a cortain group out of non response to be a certain group our sample of people choose not in response bias people give incorrect answers Ch.9 Producing Data experiment individuals we impose to measure certain treatments effect on Lobservations when on c ave na somcone huppen witnesses I see live something or in front of themMATH 243 9/30/13 Webwork Here are the carried by 10 amounts of money (cents) in coins students in a statistics class $3 43 96 79 0 81 23 65 The mean of this data is cents X= 53+43+0+ 96+79 + 0 + 0 + 87+23 +65 X= 44-6 = 446 The median of these data is cents. 48 y 9 27 43 53 45 ZA 84 % x = 48 deviation of cents The standard X=44.6 these data observation 5-(x:- ) ni (*;-8) ,-F for outlie * According to thaduto the inter quartile rule test none an outlier. "noneAnimals and people that take in more energy than they expand will get fatter. Here are data en 12 Mhes monkeys 6 lean monkeys (44* to 91 body fast and 6 obese monkeys (136 to 14d body fat). The data report the energy expended in 24 hours (kilogouter per minute) and the lean body mass (kilograms, leaving out fat) for cach monkey. Lean Energy 1.16 Body Mass 6.8. 7.3 8.6 9.7 obesa Body Mass Energy 6:11 1:42 1.17 12 1.48 10 1.4 1.65 9.7 9.3 1-06 1.26 9.5 1.21 1:34 a) What is the mean lean body mass of the lean monkeys? %, *x, + ... * * 6.8 + 7.3 + 8.6 +97713+9:51 -8-531 b) What is the lean mean body mass of x *,+*2+...+ the obese monkey 8+ 1.7 + 10 +12+12+10 X 10.28

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