Mean : all the numbers added together divided by the amount of number
Example: 2+2+2+2
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4
Median: all the number put in order from least to greatest, and it is the middle number
Example: 1,2,3,4,5 (your median is 3)
Mode: the number that appears the most in that question
Example: 1,1,2,2,3,3,3,4,4,5,5 ( your mode is 3)
Range; the largest number minus the smallest number
Example: 10, 10 15,15, 20, 25 ( your range will be 25-10, which the answer is 15)
hope this helps