Question: Blood Pressure Levels: When 14 different second-year medical students at Bellevue Hospital measured the systolic blood pressure of the same person, they obtained the results listed below (in mmHg). Assuming that the population standard deviation is known to be 10mmHg, use a 0.05 significance level to test the claim the mean blood pressure level is less than 140 mmHg. Hypertension is defined to be blood pressure that is too high because it is 140 mmHg or greater. Based on the hypothesis test results, can it safely conclude that the person does not have hypertension?

138 130 135 140 120 125 120 130 130 144 143 140 130 150