Summary PSY325 Week 2 Assignment Paper.docx PSY325 Week 2 Assignment PSY325: Statistics for the Behavioral and Social Sciences Diagnosis A Diagnosis B Diagnosis C Observed 98 87 115 Expected In the next step, we find the deviation

PSY325

Week 2 Assignment


PSY325: Statistics for the Behavioral and Social Sciences




Diagnosis A Diagnosis B Diagnosis C


Observed 98 87 115


Expected 100 100 100



In the next step, we find the deviation of the observed frequencies (O) from the expected
frequencies (E) by subtracting, as shown below.

Diagnosis A Diagnosis B Diagnosis C


Observed 98 87 115


Expected 100 100 100


Observed –
-2 -13 15
Expected



Notice that if we add all of the raw deviations together, our total will be 0. This is why the
next step is to square the deviations. Squaring a number, whether it is negative or positive,
will always result in a positive number. When we square the deviations, we preserve the
relative differences in each category without having the problem of the total being cancelled
out.

Diagnosis A Diagnosis B Diagnosis C


Observed 98 87 115


Expected 100 100 100


Observed – Expected -2 -13 15