for males 35 to 44 years of age has mean 128. The medical director of a large company looks at the medical records of 72 executives in this age group and finds that the mean systolic blood pressure in this sample is X = 126.07 with sample standard deviation s = 12.3. They are interested in whether this is evidence that the company's executives have a different mean blood pressure from the general population. This problem calls for a confidence interval for the mean systolic blood pressure of male executives aged 35 to 44 at this company. a different survey. These people are crazy. a hypothesis test for the mean systolic blood pressure of male executives 35 to 44 years of age nationwide.. a hypothesis test for the mean systolic blood pressure of male executives aged 35 to 44 at this company.