A healthcare professional wants to determine whether individuals with hypertension who take atenolol have significantly lower systolic blood pressure...

A healthcare professional wants to determine whether individuals with hypertension who take atenolol have significantly lower systolic blood pressure than individuals with hypertension who do not take atenolol. For individuals who have not been prescribed atenolol, the population systolic blood pressure mean is 160. The 51 individuals who took atenolol have an average systolic blood pressure of 124, with a sample standard deviation of 6. On the basis of these data, can the researcher conclude that atenolol significantly lowers blood pressure? What is the z-value or t-value you obtained (your test statistic)?