CSCI A113
Assignment Four

Fall 2001

Due date
At the end of lab 10 (Friday November 30).
Late policy
No late policy. You need to turn this on time.
Work policy
Working in groups is accepted but you need to turn in your own version of the assignment.
Task
Turn this homework in as if you were turning a lab. Show your spreadsheet work then turn in a piece of paper that summarizes your findings. Note there is no lab assignment due but there is a homework assignment due with each lab.

  1. For the following four paired measurements draw a scatterplot and discuss whether x and y are correlated or not. Justify your answer.
    x 0 4 4 0
    y 0 4 0 4
    Indicate the approximate value of the coefficient of correlation (sign and whether it's closer to 0 or 1).

  2. For the following four paired measurements draw a scatterplot and discuss whether x and y are correlated or not. Justify your answer.
    x 0 4 4 0
    y 0 4 3 1
    Indicate the approximate value of the coefficient of correlation (sign and whether it's closer to 0 or 1).

  3. For the following four paired measurements draw a scatterplot and discuss whether x and y are correlated or not. Justify your answer.
    x 4 0 0 4
    y 0 4 3 1
    Indicate the approximate value of the coefficient of correlation (sign and whether it's closer to 0 or 1).

Grading
The AI will provide you with feedback in a week. Grades will be posted on-line.

Last updated: October 26, 2001 by Adrian German for A113