Answered: What are the appropriate null and…

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

The supervisor of a production line believes that the average time to assemble an electronic component is at least 19 minutes. Assume that assembly time is normally distributed with a standard deviation of 3.4 minutes. The supervisor times the assembly of 14 components and finds that the average time for completion is 11.6 minutes. What are the appropriate null and alternative hypotheses?

		H0 : μ ≥ 19 and H1: μ < 19
		H0 : μ ≤ 19 and H1: μ > 19
		H0 : μ = 19 and H1: μ ≠ 19
		H0 : μ ≠ 19 and H1: μ = 19

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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