Here is data with y as the response variable. Make a scatter plot of this data.
ID: 2922023 • Letter: H
Question
Here is data with y as the response variable.
Make a scatter plot of this data. Which point is an outlier?
Enter as an ordered pair. For example (a,b) - with parenthesis.
Find the regression equation for the data set without the outlier.
Enter as an equation of the form y=a+bx. Rounded to three decimal places. For WAMAP questions, do not include the hat in y-hat.
Find the regression equation for the data set with the outlier.
Enter as an equation of the form y=a+bx. Rounded to three decimal places. For WAMAP questions, do not include the hat in y-hat.
Is this outlier an influential point?
No, the outlier does not appear to be an influential point.
Yes, the outlier appears to be an influential point.
x y 66.4 105.5 64.2 82.5 67.4 114.8 70.1 96.1 78.8 23.8 78.3 63.5 84.6 41.3 65.1 94.8 48.4 115.5 -78.3 110.5 67.1 37Explanation / Answer
The scatterplot of the data is:
Hence,
An outlier will be (-78.3, 110.5)
Regression equation without outlier: y = 240.439 - 2.36 x
Regression equation with outlier: y = 98.151 - 0.318 x
Yes, the outlier appears to be an influential point.
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