Casio Calculator (FX-83ES)
Mean and Standard Deviation on Casio Calculator (FX-83ES)
Example 1 – List of numbers
Calculate the mean and standard deviation of the following array of numbers.
8, 8, 9, 11, 14
1. Press MODE ( 2 ( 1 (this puts calculator in Stats mode)
2. Inputting the data:
Press 8 ( =
8 ( =
9 ( =
11 ( =
14 ( =
3. Press AC ( SHIFT ( 1 ( 4 (or 5 on fx-85GT)
4. For the mean, press 2 ( = (you should get an answer of 10)
5. For standard deviation, repeat step 3 and then press 3 ( =
(you should get an answer of 2.28)
Example 2 – Frequency table
Calculate the mean and standard deviation of the following frequency table.
[pic]
1. Press MODE ( 2 ( 1 (this puts calculator in Stats mode)
2. Make sure you have a two column table. If you don’t, press
SHIFT ( MODE ( “down arrow” ( 3 ( 1
3. Press 10 ( =
12 ( =
13 ( =
16 ( =
4. Now use the arrow button to bring the cursor to the top of the 2nd column and press 12 ( =
5 ( =
9 ( =
7 ( =
5. Press AC ( SHIFT ( 1 ( 4 (or 5 on fx-85GT)
6. For the mean, press 2 ( = (you should get an answer of 12.394)
7. For standard deviation, repeat step 5 and then press 3 ( =
(you should get an answer of 2.228)
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