9 gr
posted by ruslan .
3. Which statement is true about the following set of data?
18, 17, 21, 24, 21
a.The mean is greater than the median.
b.The median is less than the mode.
c.The mean and median are the same number.
d.The median and the mode are the same number.

For the defnition of the median of a set, see
http://www.mathwords.com/m/median_of_a_set_of_numbers.htm
The mean is the average value. Add them up and divide by 5. In this case, it is 20.2
The mode is the number that appears most often. Can you guess what that is? In this case it is the same as the mean.
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