To commute the mean, median, mode and range of the following statistics you would do the following:
To commute the mean of this years test, add all the numbers up, and divide the sun of the numbers by the amount of numbers added together.
To commute the mode of this years test find the number that is used the most frequent in the statistics.
To commute the median of this years test, order the numbers from least to greatest and from both sides mark off one individual number on both sides until you reach the middle number
Ex. of median:
3,4,9,12,37,37,98,128,146,198
So you would have to medians, 37 and 37, so in this instance add the 37 and 37 together and divide it by two because you added two numbers
The median of these numbers would be 37 because 74 divided by two is 37.
So once you have calculated the mean median and mode for this years, do the same process but for ten years ago.
Then compare differences.