A researcher collected sample data for 1525 women ages 18-24. That sample group has a mean serum cholesterol level of 191.7 mg/100mL with a standard...

A researcher collected sample data for 1525 women ages 18-24. That sample group has a mean serum cholesterol level of 191.7 mg/100mL with a standard deviation of 41.0 mg/100mL. I want to test the hypothesis that the mean serum cholesterol level of all women in the 18-24 age bracket is 200 mg/100mL. I'm given that the 90% confidence interval of the mean serum cholesterol level of all women in the 18-24 age bracket is (190.0, 193.4). Should I reject the Ho or fail to reject Ho and why?