Calculates the mean, median, mode, and range of a list of numbers. Press SPACE to add a number Press X to calculate Press C to clear If SPACE is pressed after you have calculated, your list will delete, make sure to add all of your numbers before calculating the answers. Mean: The sum of all of the numbers in the list divided how many numbers are in said list. Median: The middle number of the list, if there is no middle number it takes the two closet and adds them up and divides them by 2 Mode: The number that appears most in the list, can have more than one mode Range: The difference between the largest and the smallest numbers in the list.