Which of the following is NOT a requirement of testing a claim about two population means whensigmaσ1andsigmaσ2are unknown and not assumed to be equal?Choose the correct answer below. A.The two samples are independent. B.Either the two sample sizes are large(n 1n1greater than>30andn 2n2greater than>30)or both samples come from populations having normal distributions, or both of these conditions are satisfied. C.Both samples are simple random samples. D.The two samples are dependent.

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Description: Which of the following is NOT a requirement of testing a claim about two population means whensigmaσ1andsigmaσ2are unknown and not assumed to be equal?Choose the correct answer below. A.The two samples are independent. B.Either the two sample sizes

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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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Which of the following is NOT a requirement of testing a claim about two population means when

sigmaσ1

and

sigmaσ2

are unknown and not assumed to be equal?

Choose the correct answer below.

The two samples are independent.

Either the two sample sizes are large

(n 1n1greater than>30

and

n 2n2greater than>30)

or both samples come from populations having normal distributions, or both of these conditions are satisfied.

Both samples are simple random samples.

The two samples are dependent.

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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