TI-84 Plus is one of the best graphing calculators on the market today.
How to find … questions
How to find standard deviation on TI-84 plus?
In statistics, the standard deviation (SD, also represented by the lower case Greek letter sigma σ or the Latin letter s) is a measure that is used to quantify the amount of variation or dispersion of a set of data values. A low standard deviation indicates that the data points tend to be close to the mean (also called the expected value) of the set, while a high standard deviation indicates that the data points are spread out over a wider range of values.
Source: https://en.wikipedia.org/wiki/Standard_deviation
How to program quadratic formula in TI-84 Plus
Quadratic Fomula Program:
Step 1. Click “Program” => “New” => Create
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Step 2. Call it. For example “Quad”. And Click “Enter”
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Step 3. Click on “2nd” button and then “0” button to open catalog. Choose a+bi and click “Enter”.
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Step 4. Click “Enter” again => “Program” => Right to I/O Menu => Choose “Promt” => “Enter”
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Step 5. Enter “Alpha A, Alpha B, Alpha C” by clicking on “Alpha” Button, then “A” button and “,” button. Repeat with B and C. Click “Enter”.
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Step 6. Enter “(-B-√(B²-4AC))/(2A) ->(STO button) D”. Click “Enter”
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Step 7. Enter “(-B+√(B²-4AC))/(2A) ->(STO button) E”. Click “Enter”
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Step 8. Click “Program” button => Right to I/O Menu => Choose “Disp” and click “Enter”
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Step 9. Enter “D, E” (by clicking Alpha, D, comma, Alpha, E) . Click “Enter”. That’it. Click 2nd + Quit to exit.
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Step 10. Let’s test the program. Click “Program” choose “quad” and press “enter”
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Step 11. Enter Let’s test the program. Click “Program” choose “quad” and press “enter”. Enter A, B, C and get results. That’s it.
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How to do fractions on a TI-84 Plus
Simple Fraction
Step 1. Click “Alpha”=>”F1”. Now you are in Fraction menu. Select 1 option and press “Enter”.
You can enter numerator to enter denumenator press “down” button and enter it. When finish press “Right” button. Now you can enter +/- etc. To enter new fraction repeat Step 1. |
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Step 2. To calculate fraction just press “Enter”
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How to find correlation coefficient
Correlation Coefficient
Step 1. Importan. Turn On Diagnostic.
You need make it just once, so if you enable it before just skip this step. If you doesn’t do it you won’t see R and R squared when do your work. To turn it ot Click “2nd” => “0” => Diagnstic On. => “Enter” => “Enter” |
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Step 2. Enter your Data
Click “Stat” => 1. Edit => “Enter” and enter your data. |
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Step 3. Calculate it.
Click “Stat” => Right to Calculate => 4. LinReg (ax+b). Then click “Calculate”. |
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Step 4. Get the result
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How to do absolute value
Absolut Value
Step 1. Press “Math” => “Right” to “Num” Tab => 1. abs( => “Enter”
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Step 2. Enter your Data and Press “Enter”. That’s it.
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