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How do I work out how to find the new sample mean when you have a sample size of 20, the mean is 12, the data is bimodal with modes of 10 and 17 and the median is 14. After this has all been calculated a new item of data has been found, being of value 17, which needs to be added to the sample. So now the sample size is 21 and I was able to work out the new mean is 12.24 by using the equation - but I can't work out what the new median would be.
How many forums have you posted this in?
Sample size of 21 would make the median the 11th observation
Did you get the raw data to start with?
If so, put it into order and stick the new 17 in the appropriate place
Just two.
That's the problem, if we had the raw data it would be easy. But we only have the information given.
Need at least the values around the original median. ie the ones necessary to work out the original. Otherwise there is no way to work out the effect of the extra 17.