Homework Help is Here – Start Your Trial Now!
Math
Statistics
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.

Calculus For The Life Sciences
Calculus For The Life Sciences
2nd Edition
ISBN:9780321964038
Author:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
Publisher:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
Chapter13: Probability And Calculus
Section13.2: Expected Value And Variance Of Continuous Random Variables
Problem 10E
See similar textbooks
icon
Related questions
Question

Hypothesis test

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.
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.
Expert Solution
trending now

Trending now

This is a popular solution!

steps

Step by step

Solved in 4 steps with 3 images

SEE SOLUTIONCheck out a sample Q&A here
Blurred answer
Recommended textbooks for you
Calculus For The Life Sciences
Calculus For The Life Sciences
Calculus
ISBN:
9780321964038
Author:
GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
Publisher:
Pearson Addison Wesley,
SEE MORE TEXTBOOKS