Answered: To test whether the mean time needed to…

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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To test whether the mean time needed to mix a batch of material is the same for machines produced by three manufacturers, the Jacobs Chemical Company obtained the following data on the time (in minutes) needed to mix the material.

Manufacturer
	1	2	3
	16	32	22
	22	30	21
	20	35	25
	18	31	24

a. Use these data to test whether the population mean times for mixing a batch of material differ for the three manufacturers. Use a=0.05.

Compute the values below (to 2 decimals, if necessary).

Sum of Squares, Treatment
Sum of Squares, Error
Mean Squares, Treatment
Mean Squares, Error

Calculate the value of the test statistic (to 2 decimals).

The -value is

What is your conclusion?

b. At the a=0.05 level of significance, use Fisher's LSD procedure to test for the equality of the means for manufacturers 1 and 3.

Calculate Fisher's LSD Value (to 2 decimals).

What conclusion can you draw after carrying out this test?

To test whether the mean time needed to mix a batch of material is the same for machines produced by three manufacturers, the Jacobs Chemical Company obtained the following data on the time (in minutes) needed to mix the material.
Manufacturer
1
2
3
16
32
22
22
30
21
20
35
25
18
31
24
a. Use these data to test whether the population mean times for mixing a batch
material differ for the three manufacturers. Use a = 0.05.
Compute the values below (to 2 decimals, if necessary).
Sum of Squares, Treatment
Sum of Squares, Error
Mean Squares, Treatment
Mean Squares, Error
Calculate the value of the test statistic (to 2 decimals).
The p-value is - Select your answer -
What is your conclusion?
- Select your answer
b. At the a = 0.05 level of significance, use Fisher's LSD procedure to test for the equality of the means for manufacturers 1 and 3
Calculate Fisher's LSD Value (to 2 decimals).
What conclusion can you draw after carrying out this test?
|- Select your answer

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