Question 1122319
the average for frequency data is calculated as follows:


set up a table as shown below:


<pre>


category         weight       rating      weight * rating  


promptness          2           2                4
record keeping      4           7                28
appearance          1           2                2
bedside manner      3           3                9

total               10          n/a              43

</pre>


you multiply the rating by the weight to get the weight * rating.


you then add up all the weight * rating scores.


you then add up all the weight scores.


you then divide the sum of the weight * rating scores by the sum of the weight scores to get the average.


the sum of the weight * rating scores was 43.
the sum of the weight scores was 10.
the average was 43 / 10 = 4.3


the weighting factor of each category is equivalent to the frequency of each category.


here's a reference that talks about finding the average of a frequency table.


<a href= "https://www.mathsisfun.com/data/mean-frequency-table.html" target = "_blank">https://www.mathsisfun.com/data/mean-frequency-table.html</a>