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Home > CCA > Chapter 6 > Lesson 6.1.4 > Problem 6-42

6-42.
  1. Robbie’s class collected the following view tube data in problem 6-1. Homework Help ✎

  2. Distance from wall (in)

    Width of field of view (in)

    144

    20.7

    132

    19.6

    120

    17.3

    96

    14.8

    84

    13.1

    72

    11.4

    60

    9.3

    checksum 708

    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.

    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 scatterplot below. y = 1.6568 + 0.1336x

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