Education Technology

Solution 10582: Using the Chi-Squared Goodness of Fit Test on the TI-84 Plus Family or TI-Nspire™ Handheld in TI-84 Plus Mode.

How can I use the Chi-Squared Goodness of Fit test on the TI-84 Plus or TI-Nspire handheld in TI-84 Plus mode with OS 2.30 and higher?

The command for the Chi-Squared Goodness of Fit test is located under the STAT-TESTS menu. Please see the below example:

L1: {16,25,22,8,10}
L2: {16.2,21.6,16.2,14.4,12.6}

Calculate the Chi-Squared goodness of fit test for these data.

Solution:

• Press [STAT][ENTER] to enter the STATS editor.
• Enter the numbers in L1 and L2.

• Press [2nd][QUIT].
• Press [STAT].
• Press [→] [→] to select the TESTS Menu.
• Select D:c2 GOF-Test...

L1 is the list of observed values and L2 the list of expected values. The degree of freedom (df) is the count of sample categories minus sample restrictions.

• Select Calculate and Press [ENTER]. Chi-Squared= 5.995149912 and p=.3066911386 should be displayed.

Please see the TI-84 Plus family guidebooks for additional information.

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