Distribution of systolic and diastolic blood pressure for female diabetes between the ages of 30 and 34 have unknown means. The standard deviation are s=11.8mm Hg and d= 9.1mm Hg respectively [8]. A random sample of ten women is selected from this population. The mean systolic blood pressure for the sample is xs=130 mm Hg. how do I calcualte a two sided 95%confidence interval for u s, the true mean systolic blood pressure.