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6-42.

Robbie’s class collected the following view tube data in problem 6-1.

 Distance from the Wall (in) 

 Width of field of view (in) 

19.6

17.3

14.8

13.1

11.4

9.3

checksum

checksum 106.2

  1. Use your calculator to make a scatterplot and graph the least squares regression line (LSRL). Sketch the graph and LSRL on your paper. Remember to put a scale on the x-axis and y-axis of your sketch. Write the equation of the LSRL rounded to four decimal places.

    See scatterplot at 6-42 Answer eTool (Desmos): 

  2. With your calculator, find the residuals as you did in part (c) of problem 6-33. Make a table with the distance from wall (inches) as the first column, and residual (inches) in the second column. What is the sum of the squares of the residuals?

  • See table below.
    Use your calculator to find the sum of the squares of the residuals.

     Distance from wall (in) 

     Residual (in)