Step 3: Sort the Data

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Step 3: Sort the Data

Now we sort the observations into the appropriate classes by tallying. In order to keep track of what has been tallied, some people put an X by the number in the raw data table once it has been tallied. If a point falls on the boundary between two classes, it is placed in the greater class. A data point of 70 is placed in the class 70-75, not the class 65-70.

    IntervalsTally
    65 - 70\\
    70 - 75\\\\ \\
    75 - 80\\\\\\\\ \
    80 - 85\\\\\\\\\\\\\\\\\\\\\\\\ \
    85 - 90\\\\\\\\\\\\\\\\ \\\\
    90 - 95\\\\\\\\\\\\ \\\
    95 - 100\\\\\\\\ \\\
    100 - 105\\\\\\\\
    105 - 110\\\\
    110 - 115\\\\