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how to find the mean of a data set formula. Say youre given the following set of data. In this case working backwards we multiply by the number of values instead of dividing and then subtract instead of adding.
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Count the number of values in your data set. To estimate the Median use. To calculate it you take the 3rd and 4th values in the data set and average them to get a median of 25.
There is another way of calculating mean which is not very commonly used.
You can think of the mean as the average but be careful as that word has multiple definitions in mathematics. The mean discussed here applies to a sample of data and is technically called the sample mean. If you are given a mean and asked for one of the data values you can still use the basic method for determining the mean but work backwards. We can calculate its mean by performing the operation.
