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.