Answered: desired information to be accurate…

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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Question

desired information to be accurate within 0.68 decibels?
Show all work.
1. A researcher is interested in estimating the noise levels
in decibels at area urban hospitals. She wants to be 90%
confident that her estimate is correct. If the standard
deviation is 4.13, how large a sample is needed to get the
(A) Find the mean and standard error of the
distribution
(B) Find P(x bar > 73.50)
2. Assume that the population of heights of male college
students is approximately normally distributed with mean
m of 73.63 inches and standard deviation s of 6.73 inches. A
random sample of 97 heights is obtained. Show all
work.

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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