2025 Confidence Counts Contest Rules | Texas Instruments
... this Contest. All dates are expressed month/day/year. ELIGIBILITY: Open to legal residents of the fifty (50) United States and the District Of Columbia, Canada (void in Quebec), and Puerto Rico, who are at least 13 years of age. Employees (and their immediate families (parent, child, spouse o...https://education.ti.com/en/promotion/confidencecountscontest/rules
Solution 34616: Inverse Cosine of the Tangent of -5π/4 on the TI-83 Plus and TI-84 Plus Family of Graphing Calculators.
... tan(-5*π/4) is not -1 but something like -1.0000000000001. The display routine on the calculator is designed to display -1 instead of the internal number. However, arcos function will take the internal number -1.0000000000001 as input and determines it is out-of-range. Try the following example ...https://education.ti.com/en/customer-support/knowledge-base/ti-83-84-plus-family/product-usage/34616
Solution 34844: Using the Chi-Squared Goodness of Fit Test on the TI-83 Plus and TI-84 Plus Family of Graphing Calculators.
....4,12.6} Calculate the Chi-Squared goodness of fit test for these data. Solution: 1) Press [STAT][ENTER] to enter the STATS editor. 2) Enter the numbers in L1 and L2. 3) Press [2nd][QUIT]. 4) Press [STAT]. 5) Press [→] [→] to select the TESTS Menu. 6) Select D:c2 GOF-Test... Please Note: L1 ...https://education.ti.com/en/customer-support/knowledge-base/ti-83-84-plus-family/product-usage/34844
Solution 34835: Storing Graph Elements on the TI-83 Plus and TI-84 Plus Family of Graphing Calculators.
...ring a graph database: 1) Press [2ND] [DRAW] [Right Arrow] [Right Arrow] to select the STO menu. 2) Press [3] to select 3:StoreGDB. 3) Input a number from (0-9) of the GDB variable to which you want to store the graph database. 3a) You can also select a GDB variable by pressing [VARS] [3] an...https://education.ti.com/en/customer-support/knowledge-base/ti-83-84-plus-family/product-usage/34835