One in every 3,000 Caucasian babies has cystic fibrosis, a disease caused by having two defective CF alleles. One in every 365 African American babies has sickle cell disease, caused by having two sickle cell alleles. Find the calculated -score used to compare proportions and interpret it. Use a confidence level of 95%. For your convenience, the formula is Confidence Level Critical -score 90% 5% 1.645 95% 2.5% 1.96 99% 0.5% 2.576 The calculated -score is 1.78, which is not less than the critical value of 1.96, so we fail to reject the null hypothesis. The calculated -score is 1.78, which is not less than the critical value of 1.96, so we reject the null hypothesis. The calculated -score is 1.78, which is not greater than the critical value of 1.96, so we fail to reject the null hypothesis. The calculated -score is 1.78, which is not greater than the critical value of 1.96, so we reject the null hypothesis