Question

pts Compute the linear correlation coefficient between the two variables and determine whether a linear relationship exists. х 1 8 -1 18 5 2 y 13 1 3 10 4 8 11 6 3 0 15 2 Or=-0.995; linear relation exists O r=-0.885; no linear relation exists O r=-0.995; no linear relationship exists O r=-0.885; linear relation exists Question 30 4 pts The table lists the drinking habits of a group of college students. If a student is chosen at random, find the probability of getting someone who is a regular or heavy drinker. Round your answer to three decimal places. 193 Sex Man Woman Total Non-drinker Regular Drinker Heavy Drinker Total 135 53 5 187 21 15 223 322 74 20 416 0.226 0.163 0.723 0.270

Answer 1

X-Mx y-My ) (7-my]] (X-44) y-My] (& -Mm)] Y-wy(X-M») CY+7)] 4.3 6 لا کر 2.25 0.25 3 = 6.7 y 18 -4.5 9.3 20:50 86.490 - 41.850 13 - 2-5 6.25 18.490 - 10.750 8 ㅗ 4.5 -7-7 20.50 59.290 - 31.650 15 -2-7 7.280 - 4.050 10 -0.5 1.3 1.690 0.650 2 LL -1.5 2-3 2.25 5.290 - 3.450 8 +0.5 -0-7 0.25 0.400 0.350 6 2.5 -5. 6.25 32.490 - 14.250 7. 2 3.5 12.250 41.890 23.450 0 IS - 3.5 12.150 39.690 - 22.050 Mye = 3.5 My = 8.71 total 82.500 296.2001 - 155.500 My x mean of x values My - mean of y valors re I X-Mg) (Y-M? ssx xossy Z(X-M₂)² - 82.5 s3y = 2 (Y-My)? 296.L -155.5 M2 -0.1949 N82.5x (296.8 33x 2 14 ~ 50.995 linear relation exists