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# Explain how to find the deviation of an entry in a data set. What is the sumof all the ISBN: 9780321911216 66

## Solution for problem 2 Chapter 2.4

Elementary Statistics: Picturing the World | 6th Edition

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Problem 2

Explain how to find the deviation of an entry in a data set. What is the sumof all the deviations in any data set?

Step-by-Step Solution:
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# 9.26 # Variable selection (step wise selection) (Ch6) data=read.csv(file.choose()) data=data[-1] # x1:x7 are quantative factors # We will try to use all 7 independent varibales (predictors) to predict y (exclude the first column) m1=lm(y~.,data) # m1 is not adequate to predict y # Before fitting regression, check correlations first cor.test(data[,2], data[,3])\$p.value cor.test(data[,2], data[,4])\$p.value cor.test(data[,2], data[,5])\$p.value cor.test(data[,2], data[,6])\$p.value cor.test(data[,2], data[,7])\$p.value # non is significant # try to apply coding procedure to minimize the standard error # create a new matrix and store the coding procedure variables data1=matrix(0,nrow(data), 8) for (j in 2:9){ data1[,j-1]=(data[,j]-mean(data[,j]))/sd(data[,j])

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##### ISBN: 9780321911216

The full step-by-step solution to problem: 2 from chapter: 2.4 was answered by , our top Statistics solution expert on 08/25/17, 09:43AM. This full solution covers the following key subjects: . This expansive textbook survival guide covers 66 chapters, and 3049 solutions. The answer to “Explain how to find the deviation of an entry in a data set. What is the sumof all the deviations in any data set?” is broken down into a number of easy to follow steps, and 24 words. Since the solution to 2 from 2.4 chapter was answered, more than 273 students have viewed the full step-by-step answer. Elementary Statistics: Picturing the World was written by and is associated to the ISBN: 9780321911216. This textbook survival guide was created for the textbook: Elementary Statistics: Picturing the World , edition: 6.

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Explain how to find the deviation of an entry in a data set. What is the sumof all the