# Assume that the data values for the measurements of the systolic blood pressure of adults aged 25 are normally distributed with a standard deviation of 10 millimetres of mercury (  and a mean of .

Assume that the data values for the measurements of the systolic blood pressure of adults aged 25 are normally distributed with a standard deviation of 10 millimetres of mercury (  and a mean of .

Assume that the data values for the measurements of the systolic blood pressure of adults aged 25 are normally distributed with a standard deviation of 10 millimetres of mercury (  and a mean of . Do parts a-d, below.
a) If an individual is selected, find the probability that the individual’s pressure will be between 115 and .
b) If a sample of 4 adults is selected, find the probability that the sample mean will be between 115 and .
c) If a sample of 10 adults is selected, find the probability that the sample mean will be between 115 and .
Write answers to Parts  here:

 a) b) c)

d) Compare your answers to Parts , and  by creating a well-labeled graph. First identify, and then explain the pattem of results using concepts and methods from the course.