Question

12.2.RA-2 Assigned Media Question Help A sociologist randomly selects 376 females 15 to 19 years old and asks each to disclose her family structure at age 14 and whether she has had sexual intercourse. Use the results in the accompanying table to complete parts (a) through (e) below. Click the icon to view the data table of family structure and sexual activity. (a) Compute the expected values of each cell under the assumption of independence. Had sexual Both Biological or Parent and Intercourse Adoptive Parents Single Parent Stepparent 64 60 44 Yes Nonparental Guardian 30 42 35 17 84 No (Round to two decimal places as needed.)

Answer 1

Given table of observed values Both Bio Single Parent & Parent & Non-parestal Non-parestal Row Adaptive Step Totals Yes 44 30 No 84 Column 79 64 Co 42 35 198 178 376 148 102 47 Totals Expected Value Row total x Colum total hand total For egi for Cell (1, 1), Expected value z 198 x 148 376 z 77-9362 ²177.94

Cell (1,2) - 198x102 53.7127 53.71 376 Similarly, calculating for other cells, the expected value table is, Single Parunt & Nonparental Adaptive Yes Both biol Parent Step 77.94 24.75 53.71 48.29 41.60 37.40 No 70.06 22:25