A population of all steel plates produced by a company has an average length of 80 cm with a standard deviation of 7 cm. After 3 years, the company's engineers doubted the hypothesis about the average length of the steel plate. In order to confirm the validity of the hypothesis, a random sample of 100 steel plates was taken from the population above, and the result was a count of 83 cm, and the standard deviation was constant. Is there any reason to doubt that the average length of the steel plate produced by the company is 80 cm at the a = 5% significance level? The way to answer this type of question is to determine HO and H1, determine the level of significance (degree of confidence), determine test criteria, conduct tests and draw conclusions.
A population of all steel plates produced by a company has an average length of 80 cm with a standard deviation of 7 cm. After 3 years, the company's engineers doubted the hypothesis about the average length of the steel plate. In order to confirm the validity of the hypothesis, a random sample of 100 steel plates was taken from the population above, and the result was a count of 83 cm, and the standard deviation was constant. Is there any reason to doubt that the average length of the steel plate produced by the company is 80 cm at the a = 5% significance level? The way to answer this type of question is to determine HO and H1, determine the level of significance (degree of confidence), determine test criteria, conduct tests and draw conclusions.
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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Hypothesis test
Transcribed Image Text:A population of all steel plates produced by a company has an average length of 80 cm
with a standard deviation of 7 cm. After 3 years, the company's engineers doubted the
hypothesis about the average length of the steel plate. In order to confirm the validity of
the hypothesis, a random sample of 100 steel plates was taken from the population
above, and the result was a count of 83 cm, and the standard deviation was constant. Is
there any reason to doubt that the average length of the steel plate produced by the
company is 80 cm at the a = 5% significance level? The way to answer this type of
question is to determine HO and H1, determine the level of significance (degree of
confidence), determine test criteria, conduct tests and draw conclusions.
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