Apply the principles to create a well-designed scatterplot of X Vs. Y 1: Use jit
ID: 3275387 • Letter: A
Question
Apply the principles to create a well-designed scatterplot of X Vs. Y
1: Use jittering if appropriate.
2: If jittering is appropriate for this scatterplot explain why.
3: Use a dark blue, solid disk of appropriate size as the plotting symbol.
4: Use the Minitab lowess smoothing function to add an appropriately smoothed curve to the scatterplot.
5: Explain why smoothing is frequently used prior to conducting a regression analysis.
6: Next add a simple linear regression line to the scatterplot.
7: Paste the regression equation from part (b) below into your graph. Paste your graph (approximately 3”x 4”) into a word file for submission.
Child Midparent
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Explanation / Answer
1.
x=read.csv("Book23.csv")
Ch=x[,1]
MP=x[,2]
par(mfrow=c(2,2))
plot(Ch~MP, pch=15)
plot(Ch~jitter(MP), pch=15)
plot(jitter(Ch)~MP, pch=15)
plot(jitter(Ch)~jitter(MP), pch=15)
2 We have discrete data that is almost continuous becuase sometimes symbols are plotted on top of one another so much that the relationship is obscured. THus, variables might be approximately linear with other variables.
3.
4,5 Minitab is not there
7, 8