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Here is data with y as the response variable. x y 32.2 18.3 34.1 25 40.8...

Here is data with y as the response variable.

x y
32.2 18.3
34.1 25
40.8 2.2
26 0.2
20 50.8
46.1 27.7
24.8 -6.9
14.5 24.5
14.7 24.3
25.1 35.1
-96.1 63.5

Make a scatter plot of this data. Which point is an outlier? Hint: Copy the data and paste them into Excel. Then select the two columns. Then click Insert and choose the scatterplot icon.
Answer:
Enter as an ordered pair. For example (x,y) - with parenthesis.

Find the regression equation for the data set with the outlier. Hint: Use Excel's =SLOPE(y_array,x_array) and =INTERCEPT(y_array,x_array) equations.
Answer:
Enter as an equation of the form y=b0+b1x. Rounded to three decimal places. Do not include the hat in y-hat.

Find the regression equation for the data set without the outlier. Hint: First delete the point. Then use Excel's =SLOPE(y_array,x_array) and =INTERCEPT(y_array,x_array) equations.
Answer:
Enter as an equation of the form y=b0+b1x. Rounded to three decimal places. 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.
math   Statistics-And-Probability   
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Homework Answers

Answer #1

outlier point =(-96.1 ,63.5)

regression equation for the data set with the outlier.:

y=29.862+(-0.350)*x

regression equation for the data set without the outlier

y=29.867+(-0.350)*x

No, the outlier does not appear to be an influential point.

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