Twelve second-year medical students at a local hospital measured the systolic blood pressure of the same person, they obtained the results listed below (in mmHg). Hypertension is defined to be a blood...

Twelve second-year medical students at a local hospital measured the systolic blood pressure of the same person, they obtained the results listed below (in mmHg). Hypertension is defined to be a blood pressure level that is too high because it is 140 mmHg or greater. Assuming that the distribution is approximately normal, use a significance level of 0.05 to test the claim that the mean blood pressure level for this patient is less than 140 mmHg. What is the critical value for this hypothesis test?

Twelve second-year medical students at a local hospital measured the systolic blood pressure of the same person, they obtained the results listed below (in mmHg). Hypertension is defined to be a blood pressure level that is too high because it is 140 mmHg or greater. Assuming that the distribution is approximately normal, use a significance level of 0.05 to test the claim that the mean blood pressure level for this patient is less than 140 mmHg. What is the critical value for this hypothesis test?