When making a statistical inference about the mean of a normally distributed population based on a sample drawn from that population, which of the following statements is correct, all else being equal? The 68% confidence interval is wider than the 90% confidence interval. The 90% confidence interval is narrower than the 95% confidence interval. The 90% confidence interval is wider than the 99% confidence interval. The 99% confidence interval is narrower than the 68% confidence interval.