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Contributor III
Contributor III

AVG does not return what I calculate as the average


I have a dataset with several duplicate records. I am trying to calculate an average response time to an incident. Each incident has a separate response time but where the record is duplicated the response time is also duplicated. I am dealing with this by using DISTINCT

My table calculates the total response time for each category and calculates the number of distinct records.

I calculate the average by dividing one by the other.

however since I need to calculate the 90th percentile also I checked the maths by using avg. it provides a different answer.

what is going wrong and how do I fix it please?

1 Reply

Average can be tricky... look here for why Average – Which average?