Education Technology

Solution 11711: Calculating Standard Deviation on the TI-83 Family and TI-84 Plus Family of Graphing Calculators.

How do I calculate standard deviation on my TI-83 family or TI-84 Plus family calculator?

Standard deviation can be calculated using several methods on the TI-83 family and TI-84 Plus family graphing calculators. Standard deviation can be calculated by using the stdDev() function. The stdDev() function can be located by performing the following:

• Press [2nd][LIST]
• Scroll to MATH and select 7:stdDev(

Follow the examples listed below to calculate standard deviation of one or two list of data.

Ex. Find the standard deviation of the data list.
List1: 2,3,5,1,4

• Press [2nd], [LIST], scroll to MATH and select 7:stdDev(
• Press [2nd] [(] [2] [,] [3] [,] [5] [,] [1] [,] [4] [2nd] [)] [)]
• The screen should now display 'stdDev({2,3,5,1,4})'
• Press [ENTER] and the standard deviation of the list will be displayed


Ex. Find the standard deviation of the two data list.
List1: 2,3,5,1,4
List2: 1,2,5,4,1

• Press [2nd], [LIST], scroll to MATH and select 7:stdDev(
• Press [2nd] [(] [2] [,] [3] [,] [5] [,] [1] [,] [4] [2nd] [)] [)] [,]and [2nd] [(] [1] [,] [2] [,] [5] [,] [4] [,] [1] [2nd] [)] [)]
• The screen should now display 'stdDev({2,3,5,1,4},{1,2,5,4,1})'
• Press [ENTER] and the standard deviation of the two list will be displayed


The standard deviation is also calculated and displayed when 1-variable or 2-variable statistics are calculated.

The example below will demonstrate how to calculate 1-variable statistics on the TI-83 family and TI-84 Plus family.

x ={5, 9, 7, 4, 6, 250, 35, 100, 84}

• Press [STAT] [ENTER] to enter the statistics list editor
• Enter the numbers into the list by pressing each number and [ENTER]
• Press [STAT] [right cursor] to enter the CALC menu
• Select 1:1-Var Stats, 1-Var Stats will be typed on the home screen, press [ENTER]
• The statistics will be displayed (The cursor keys can be used to scroll through the entire list of results)


The example below will demonstrate how to calculate 2-variable statistics on the TI-83 family and TI-84 Plus family.

Data for this example: x: {3,5,8,10}
y: {7,2,3,1}

To enter the data into the calculator, do the following:

• Enter STAT edit mode by pressing [STAT][1].
• Enter the data in the L1 and L2 lists, pressing enter after each entry.
• Press [2nd][QUIT] to leave the editor.

 

To calculate 2-variable statistics, do the following:

• Press [STAT][right cursor] to enter the CALC menu.
• Select 2:2-Var Stats. (2-Var Stats will be typed on the home screen)
• Press [2nd][L1][,][2nd][L2][ENTER]
• The statistics will be displayed (The cursor keys can be used to scroll through the entire list of results)

 


Please see the TI-83 Plus Family and TI-84 Plus Family guidebooks for additional information.

TI-Nspire handheld in TI-84 Plus mode users may refer to the TI-84 Plus family guidebook.