Answered: According to the professional house…

Name: According to the professional house framers organization in North Texa
Uploaded: 2024-03-20T07:07:12.000Z
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Description: According to the professional house framers organization in North Texas, the mean gross income for workers in this trade in the area follows the normal probability distribution with a mean salary of $45,000 and a population standard deviation of $3,0

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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According to the professional house framers organization in North Texas, the mean gross income for workers in this trade in the area follows the normal probability distribution with a mean salary of $45,000 and a population standard deviation of $3,000. A recent investigative reporter from UNT found, for a sample of 120 framers, the mean gross income was $45,500. At the .10 significance level, is it reasonable to conclude that the mean salary is not equal to $45,000.

What is the calculated z-value ? (answer should be in x.xx format)

What is the associated p-value ? (answer should be in 0.xxxx format)

Do you Reject or Fail to Reject that the mean salary is $45,000? (answer should be Reject or Fail to Reject)

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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