Answered: Question 2. A random sample of 22…

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 2.
A random sample of 22 values was selected from a population and the sample standard
deviation was computed to be 340. Based on this sample result, compute a 90% confidence
interval estimate for the true population standard deviation.

Question 3.
Two samples of sizes 15 and 16 are drawn from two normally distributed populations having
means of 16 and 11, respectively. If the sample variances are 6 and 5, determine whether the first
sample has significantly lower variance than the second sample at 0.025 significance level

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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