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Thread: Rolling average of an average

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    Rolling average of an average




    I have egg count data from a series of insect traps collected weekly. Each week I work out the average of the egg counts for 40 traps. Can I use these weekly averages to calculate a rolling average (4 point). I was taught that it is incorrect to calculate the average of an average. Taking it further could I calculate an 8 point rolling average of the 4 week rolling average and continue calculating additional rolling averages until I get the result I want?

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    Re: Rolling average of an average


    hi,
    I guess there is a point in not adding averages if the sample sizes are different, e.g one average is build of 10 measurements and the other of 5, though I have seen the "mean of means" calculated in such cases as well. In your case, with a uniform sample size, I see no worries.
    regards

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