Statistical Sciences 1024A/B Chapter Notes - Chapter 6: Sleeve Gastrectomy, Confounding, Animal Testing
1 Apr 2015
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6. 1: (a) this table describes 736 + 450 + 193 + 205 + 144 + 80 = 1808 people. = 1379 played video games. (b) the percent of boys earning a"s and b"s is (736 + 205)/1808 = We do this for all three grade levels. Of all boys, 32. 85% + 15. 10% = 47. 95% received a grade of c or lower. 6. 2: (a) the sum of all entries is 11,378. There are 2814 + 2648 = 5462 undergraduates in the 20 24 age group. The marginal distribution for ages of undergraduates follows: 6. 3: there are 736 + 450 + 193 = 1379 players. Of these, 736/1379 = 53. 37% earned a"s or b"s. Similarly, there are 205 + 144 + 80 = 429 nonplayers. Of these, 205/429 = 47. 79% earned a"s or. Continuing in like manner, the conditional distribution of grades for players follows: It doesn"t look like there"s a big difference between these conditional distributions.
