Correlation coefficient

CODAP Forums CODAP Help Forum Correlation coefficient

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  • #340 Score: 0
    Joachim Engel
    Participant

    How can I compute a correlation coefficient with CODAP?

    Joachim Engel

    #341
    Bill Finzer
    Keymaster

    Hello Joachim,

    One way is to define an attribute that has the formula

    correlation(attribute1,attribute2)

    as shown in the attached screenshot. Notice that by dragging the new attribute all the way to the left to promote it, you get a single value that is less confusing than if you left it in the “flat” part of the table.

    Another way is to make a scatterplot of the two attributes and, with the ruler icon on its inspector, add a least squares regression line. On the line you will see the value of r-squared.

    Bill Finzer

    Attachments:
    #1377

    Preface: I am very new to CODAP.  I am trying to find ways to use this in my classroom since we have chromebooks and can’t use R or Minitab.

    I found how to make an LSRL and find r, but is there a way to make other regression models (such as exponential)?

    • This reply was modified 4 years ago by .
    #1379
    Bill Finzer
    Keymaster

    There are no built-in regression models in CODAP other than linear (yet). This is a consequence of no funded collaborating projects having yet requested such a feature.

    Bill

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