Operations:   Basic Statistics


Here is a first look at statistics with the Ti-83.  It has remarkable capabilities not mentioned here.  After entering data, the Ti will show the mean, median, and standard deviation of the data.  Here's how:

  1. To enter data, press the STAT button.  This is the same as entering data to plot points.wpe1.jpg (6160 bytes)  The data goes into a list. go to plotting points
  2. AFTER entering data, use the right arrow key to highlight CALC, wpe2.jpg (8311 bytes)







  3. Press ENTER or 1 to see 1-variable statistics wpe3.jpg (3201 bytes)
  4. Press 2nd-1 (that's L1) and ENTER .
    If you put data into another list, be sure to press the correct key.



  5. The results show ...wpe4.jpg (6574 bytes)
    bulletThe mean
    bulletSum of the entries 
    bulletSum of squares of entries
    bulletStandard deviation of a sample
    bulletStandard deviation of the whole
    (Use this one most of the time)
    bulletNumber of items in data
    Use the down-arrow to see more
    bulletSmallest item in data  wpe6.jpg (5349 bytes)
    bulletValue at the 1st quarter
    bulletMedian of the data
    bulletValue at the 3rd quarter
    bulletLargest value in data