4. In order to determine the effect of certain oral contraceptive on weight gain, nine healthy females were weighed prior to the start of its use and gain at the end of 3-months period. Table 2 weight of nine healthy females who took certain oral contraceptive Subject No. 12345678 Initial weight (kg) 50.0 55.4 53 60 55 56 51 54 53 Weight after 3 months(kg) 51.2 56.4 57 58 57 57.2 50.2 54.4 53.8 Is there sufficient evidence to conclude that females experienced gain in weight following 3 months of the oral contraceptive use? (known, t 0.05,8=1.86, you can use SPSS software to solve this question) 9
