Tuesday, June 12, 2012

Exam Notes: How to find out mean, median, mode, range and outlier?

MEAN (AVERAGE)- You find out the mean by adding up all the numbers and dividing them by the number of numbers you added.
e.g 1 +2 + 3+ 4 + 5 = 15/5 = 3 <-- the mean is 3, you get it?

MODE- You find out the mode by looking for the number(s) that occurs more often.
e.g 1, 1, 2, 2, 2, 2, 3, 5 <--- 2 is the mode because it happens more often than any of the numbers.

MEDIAN- You find out the median by PUTTING THE NUMBERS IN ORDER FIRST,  then you put a finger on the first number and one on the last number and make them go closer, the number that your fingers land on is the median. But if you don't land in any middle number, find out the mean of the two numbers your fingers land on. The mean of the two of those numbers is the median.
e.g 1, 2, 4, 6, 8, 16, 20 <--- the median is 6 because it is the middle number.

Range- To find the range, you must find the smallest number and the largest number and subtract them.
e.g 5, 6,12, 90: 90 - 5 = 85 <--- the range is 85.

Outlier- To find the outlier(s), you just have to locate the number that doesn't fit in.
e.g 5, 20,21,23, 90 <-- the outliers are 5 and 90 because they don't fit in with the 20s.

Use this information wisely.

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