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S1 - Coding mean standard deviation
I have found the mean of some grouped data on a table correctly by using coding
i did this by using coding, finding the coded value and multiplying it by the class width and adding the value that i took away in the beggining
how do to go from getting the mean by coding to the standard deviation now? using my table that i've added the coded y and fy and fy^2
tell me if this is confusing
i did this by using coding, finding the coded value and multiplying it by the class width and adding the value that i took away in the beggining
how do to go from getting the mean by coding to the standard deviation now? using my table that i've added the coded y and fy and fy^2
tell me if this is confusing
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