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Description: A 30 randomly selected women living in a certain area was selected as part of a study on determining the hemoglobin levels of women of that area. The average level was found to be 9.5. In a very large earlier study the st. dev was reported to be 1.3.

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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A 30 randomly selected women living in a certain area was selected as part of a study on determining the hemoglobin levels of women of that area. The average level was found to be 9.5. In a very large earlier study the st. dev was reported to be 1.3.

Assuming the standard deviation is unchanged and that the hemoglobin level is normally distributed, provide an expression for calculating a 95% confidence the interval for the mean hemoglobin level of women in the area under consideration

Select one:

A. 9.5 – 0. 95 < x' <9.5 + 0.95

1.9 – 0. 95 <x' <1.9 + 0.95

c. 9.03 < x' < 9.97

A. 1.3 -0.47 < x' <1. 3 + 0.47

e. None of these

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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