Solution 34844: Using the Chi-Squared Goodness of Fit Test on the TI-83 Plus and TI-84 Plus Family of Graphing Calculators.
...2. 3) Press [2nd][QUIT]. 4) Press [STAT]. 5) Press [→] [→] to select the TESTS Menu. 6) Select D:c2 GOF-Test... Please Note: L1 is the list of observed values, Observed must contain all integers greater than or equal to 0. L2 the list of expected values, expected is created upon successful comp...https://education.ti.com/en/customer-support/knowledge-base/ti-83-84-plus-family/product-usage/34844
Solution 37275: Troubleshooting a TI-Nspire CX or TI-Nspire CX CAS Calculator That Will Not Turn On, Charge or Function Properly.
...eypad and please ensure that the reset button located on the back is not stuck down below the bottom case. If it appears stuck, use a paper clip to move it back into position. It is very important to not use an object that can leave behind debris, such as a pencil. If the TI-Nspire CX or TI-Nspi...https://education.ti.com/en/customer-support/knowledge-base/ti-nspire-family/troubleshooting-messages-unexpected-results/37275