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INTRODUCTION TO STATISTICS

TI-83 INSTRUCTION PAGE

BASIC OPERATION OF TI-83

The TI-83 Calculator keyboard is configured as shown below:

TO TURN ON THE TI-83

Hit ON. You will see a blank screen

BASIC CALCULATIONS

The Ti-83 knows the order of operations in math. What does this mean? This means you ordinarily do not have to worry about how to enter an expression and can enter it as written. For example suppose you wish to do the following calculation:

2(35) + 4 - 6/3+ 8^2

You can just enter this into the TI-83 as it is written (note use divide to get / and the ^ symbol is used for exponents). After you enter the expression hit the ENTER key to get the answer.

Did you try it? Here is what your screen should show:

There are however a few tricks to know when trying to do some operations. For example, consider the following calculation:

. To do this operation you would need parenthesis. This is due to the fraction bar in the expression. Here is the correct way to enter this expression

( 3 - 4(5 + 7^3))/(6 - (-8)) Note that you use the key next to the enter button for the negative sign and the key next to 6 for the subtraction sign. Try entering this expression on your calculator. Your screen should now look like this:

When using mathematical functions such as square root or log, you should also be careful with parenthesis. For example suppose you wish to calculate the expression:

. To do this first hit 2nd (the yellow key) and the x squared button (one next to the comma). You should see a square root and a parenthesis. The TI-83 knows you want this parenthesis, so you do not need to type one in (the TI-82 does not do this so be careful if you have that model). Now type 52.54 + and hit the log key (next to the 7 key), again you will note the parenthesis is entered for you. Now finish by typing 72.8391 and two right parentheses. These are to close the parenthesis for the log and for the square root. Now hit enter to finish the calculation. Did you try it? Here is what your screen should display

Questions - please don't hesitate to write me or just ask.

For practice try to problems on page p. 27 and 28. The answers are listed below

  1. 2.636
  2. 3.6055513
  3. 3.6055513
  4. 1.8716113
  5. 1067.1111
  6. 1.3444988
  7. 5005
  8. 0.84235978