Basic Stats

Mean

the most frequent number

Mode

Median

the "middle" number of the data

Range

The difference between the biggest and smallest numbers

the average of all the data

Mean, median, mode, range...All these words? Well, they arethe basics of statistics! Let's break them down a bit to betterunderstand them!

Plankton?Soooo basic!

A fisherman counted the different types of fish he saw as he was fishing. Here are the totals he had at the end of the day. 8 10 11 12 1414 14 15 17 25

EXAMPLE!

USING THE CALCULATOR!Step1) Hit [STAT] and select "Edit"Step2) Type your data in the L1 column.Step3) Hit [STAT], hit the right arrow to the "Calc" tab, and select "1-Var Stats". Hit [Enter] and this will give you all your stats!

SYMBOLS

Mean = If you add up the numbers (140) and divide by how many numbers there were (10), you get 140 / 10 = 14

Mode = Since "14" appears three times, it is the most frequent, and therefore the mode is 14

Median = Start by counting from the beginning and end of the numbers. Go until you are in the middle, which would be "14" and "14". This means the median is 14

Range = Take the largest number (25) and subtract the smallest (8). 25 - 8 = 17. Done!