A researcher wanted to investigate whether there is a signiﬁcant diﬀerence in the strength of paper towel for a collection of brands. The ANOVA table output is shown below. What is the value of F. SS df MS F Brand 21728 4 ( ) ( ) Error 13104 18 ( ) What is the value for F?

A researcher wanted to investigate whether there is a signiﬁcant diﬀerence in the strength of paper towel for a collection of brands. The ANOVA table output is shown below. What is the value of F. SS df MS F Brand 21728 4 ( ) ( ) Error 13104 18 ( ) What is the value for F?

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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A sample of 10 students took a class designed to improve their SAT math scores. Following are their scores before and after the class. Can you conclude that the mean increase in scores is greater than 15 points? Let m1 represent the mean score after the class and md=m1-m2. Use the a=0.05 level and the p-value method with the TI-84 Plus calculator. before is 447,440, 439, 435, 451, 453, 491, 526, 473, 440. after is 482, 479, 451, 431, 454, 463, 511, 529, 493, 466.
For this question, why is the numerator always 1 for the F-statistic?
Please answer with explanation. I will really upvote.
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Solve it on paper! Please use t tests on this question. Do not use z tests!
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A1