# 1 Diastolic blood pressures are assumed to follow a normal distribution with a mean of 87… 1 Diastolic blood pressures are assumed to follow a normal distribution with a mean of 87 and a standard deviation of 10. a. What proportion of people have diastolic blood pressure less than 90? n have diastolic blood pressur c. If someone has a diastolic blood pressure of 100, what percentile is he/she in? 2. Suppose that the average Lehman College student reports using social media like Facebook and Snapchat an average of 6 hours a week, with a standard deviaton of 1.5 hours. A sample of 100 Lehman Health Science students are randomly selected and asked about their social media use. What would you expect the mean and standard deviation of the sampling distribution to be? a. b. What would be the probability of finding a person who uses social media 7 hours or more? What would be the probability of finding a sample of 100 students whose average social media use being 7 hours or more? c. d. How could you explain the difference between the two answers in b and c?