#
Suggested answer to exercise: Checking student data, 5

Question 5: Returning to the head circumference data, delete the invalid observations.
Now compute the difference between the two measurements of head circumference.

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Suggested answer

We compute the difference by __Transform__, __Compute__, then type 'difference' into
__Target variable__.
Select variable head circ 1 and put it into the numerical expression.
Type '-'.
Select variable head circ 2 and put it into the numerical expression.
You should now have head circ 1 - head circ 2.
Click __OK__.

A new variable 'difference' should now appear in the SPSS Data Editor.

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Last updated: 20 October, 2006.

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