1 pts Researchers want to construct a 95% confidence interval to estimate pt - Pc using the sample data in the table below. Pt = proportion of positive tests with the treatment Pc = proportion of positive tests with the control Sample Data Treatment Control Positive 21 14 Negative 16 23 Have assumptions been met to use the normal approximation method when constructing this confidence interval? No, the normal approximation method should not be used Yes, the normal approximation method may be used