Ms. Price

Statistics

Mean absolute deviation means the mean distance of the numbers from their mean. It basically tells you how far are the numbers, on average, from the mean of the data.
Here is the video on how to calculate the mean absolute deviation on a calculator to accompany the notes. Below is a shortened version of the directions from the video on finding the M.A.D. - Input your list of data into the list section for L1 by clicking STAT --> EDIT. Take note of the list that you're adding your data to. You will need to know this for the next step.
- At the top of L2, you will be calculating the absolute deviation from the mean of L1. Basically this mean that you need to find the absolute value of the difference of the mean and the numbers in the data set. To do this, make sure that you highlight the column labeled L2 and input ABS(L1-(MEAN(L1)).
- Now you should see a list of data populate under the L2 column showing you how far each number in L1 is from the mean of all of the data. All of the numbers should be positive. You will use this list in L2 to find the average. Exit from the lists by pushing 2ND ---> QUIT. This will bring you to the main screen.
- Put the MEAN(L2) and hit ENTER. You will be given the mean absolute deviation of the data.
- You can find ABS under MATH --> NUM. To input the list name for L1 (or any other list) go to 2ND ---> STAT and select the list name. To input MEAN into the calculator, go to 2ND --> STAT --> MATH ---> MEAN
The website here has a good explanation of how to find the M.A.D. by hand. Practice.
0 Comments
## Leave a Reply. |
## AuthorWrite something about yourself. No need to be fancy, just an overview. ## Archives## Categories |

Powered by

✕