Eye color is determined by your genes You took two random samples of people in your town In one sample 15 out of 30 had brown eyes In your second sample 12 out of 30 had brown eyes Find the calculated z score used to compare proportions and interpret it Use a confidence level of 95 For your convenience the formula is z P1 P p 1 P Confidence Level 90 95 99 5 2 5 0 5 Critical z score 1 645 1 96 2 576 The calculated z score is 0 78 which is not greater than the critical value of 1 645 so we fail to reject the null hypothesis The calculated z score is 0 78 which is not greater than the critical value of 1 645 so we reject the null hypothesis The calculated z score is 0 78 which is not greater than the critical value of 1 96 so we fail to reject the null hypothesis The calculated z score is 0 78 which is not greater than the critical value of 1 96 so we reject the null hypothesis