統計學問題有關抽樣

The average diastolic blood pressure of a certain age group of people is 120mm Hg. The standard deviation is 5.6. If an individual from this age group is selected, find the probability that his or her pressure will be the following. Assume the variable is normally distributed. If an individual is selected, find the probability that the individual’s pressure is between 122.8 and 126.55 mm Hg.Draw diagrams to illustrate the area under the normal curve for your answers.

thx for ur ans!