You are deciding whether to employ a z procedure or a t procedure to test hypotheses about the mean of a population using a significance level of 0.05 for a sample size of 50. Which of the following statements is correct? Question 17 options: You should not use the t procedure, because the population does not have a Normal distribution. You may use the z procedure, but only if you use the sample standard deviation. You may not use the z procedure because you know the population standard deviation. You should use the t procedure, provided you do not know the population standard deviation.

Answered: You are deciding whether to employ a z…

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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You are deciding whether to employ a z procedure or a t procedure to test hypotheses about the mean of a population using a significance level of 0.05 for a sample size of 50. Which of the following statements is correct?

Question 17 options:

	You should not use the t procedure, because the population does not have a Normal distribution.
	You may use the z procedure, but only if you use the sample standard deviation.
	You may not use the z procedure because you know the population standard deviation.
	You should use the t procedure, provided you do not know the population standard deviation.

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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