The cerebral blood flow (CBF) in the brains of healthy people is normally distributed with mean of 74 and a standard deviation of 16. In a sample of 1000 people What is the proportion of healthy people will have CBF readings between 65 and 85? How many healthy people from the sample will have CBF readings above 70?

The cerebral blood flow (CBF) in the brains of healthy people is normally distributed with mean of 74 and a standard deviation of 16. In a sample of 1000 people What is the proportion of healthy people will have CBF readings between 65 and 85? How many healthy people from the sample will have CBF readings above 70?

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018

18th Edition

ISBN:9780079039897

Author:Carter

Publisher:Carter

Chapter10: Statistics

Section10.5: Comparing Sets Of Data

Problem 14PPS

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[Q9P1] Fill in the blanks: The cerebral blood flow (CBF) in the brains of healthy people is normally distributed with mean of 74 and a standard deviation of 16. In a sample of 1000 people

What is the proportion of healthy people will have CBF readings between 65 and 85?
How many healthy people from the sample will have CBF readings above 70?

Features Features Normal distribution is characterized by two parameters, mean (µ) and standard deviation (σ). When graphed, the mean represents the center of the bell curve and the graph is perfectly symmetric about the center. The mean, median, and mode are all equal for a normal distribution. The standard deviation measures the data's spread from the center. The higher the standard deviation, the more the data is spread out and the flatter the bell curve looks. Variance is another commonly used measure of the spread of the distribution and is equal to the square of the standard deviation.

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