. Let X be a measurement of a patient's blood pressure, which follows the normal distribution with = 5 mmHg center around the true blood pressure. Let the null hypothesis be that the patient's blood pressure is = 120, and the alternative hypothesis H1 : 6= 120 with significance level = 0.05? Supposed that the patient's blood pressure is measure to be 130 mmHg.

• (a) Is it a one-sided test?
• (b) Calculate the p-value.
• (c) Draw a conclusion.