36. Blood Pressure. A recent study²¹ compared the systolic blood pressure readings of two groups of adults: those ages 30–44 and those ages 70-79. A random sample of 100 individuals in the younger group had a sample mean systolic blood pressure reading of 111, with a sample standard deviation of 5. A random sample of 100 individuals in the older group had a sample mean systolic blood pressure reading of 134, with a sample standard deviation of 13. Test whether the population standard deviation of the younger group is less than that of the older group, using . Assume that the samples are independent and that the two populations are normally distributed.