Despite its capabilities, the TI-83 is designed to be easy to operate. To turn the calculator on, Press the "ON" button located in the bottom left corner of the keypad. Enable access to the menus displayed above the calculator keys by pressing the "2nd" button located in the upper left corner of the calculator's keypad.
To access the probabilities functionality built into the calculator, VARS access is required. The "VARS" button is located to the left of the "Down" directional key. After pressing the "VARS" button, use the calculator's down arrow key to highlight the option for "0:binompdf(". Select this option by pressing the "Enter" key located in the bottom right corner of the calculator.
After selecting "0:binompdf(" from the "VARS" menu, calculate the P(X = x) by entering the "N", "P" and "X" figures given into the calculator and then pressing the "Enter" key. After pressing the "Enter" key, the correct calculation to four decimal places will be displayed on the calculator's screen.
Calculate the P(X less than or equal to x) by selecting the "A:binompdf(" menu as opposed to the "0:binompdf(" menu. When in the correct menu, enter the "N", "P" and "X" figures given into the calculator and then press the "Enter" key. The correct calculation to four decimal places will be displayed on the calculator's screen after the "Enter" key is pressed.