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Common Population Variance Calculate the common population variance for the following...

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minnsy229 | Honors

Posted June 25, 2012 at 11:53 AM via web

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Common Population Variance

Calculate the common population variance for the following data (to at least three places of decimals) - This has to be one answer for all of the data!!!!

 

The mean number of flowers per plant for Sample 1 = 6.44 and Sample 2 = 7.20

The estimated population standard deviation of number of flowers per plant Sample 1 = 1.51 and Sample 2 = 1.80

 

And Sample size for Sample 1 = 9 and Sample 2 = 20

Calculate S^2/c  (the common population variance) for these data (to at least three places of decimals).

S^2/c =   (This has to be one answer for all of the data!!!!)

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jjrichardson | Student, College Freshman | Valedictorian

Posted August 19, 2012 at 3:47 AM (Answer #2)

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ANOVA: Mean squares and the common population variance

In an effort to counteract student cheating, the professor of a large
class created four versions of a midterm exam, distributing the four
versions among the 344 students in the class, so that each version was
given to 86 students. After the exam, the professor computed the
following information about the scores (the exam was worth 200 points):

Group sample size sample
mean sample varience

Version A 86
155.9 458.2

Version B 86 155.9
423.6

Version C 86
151.2 412.9

Version D 86
153.9 373.8

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