| Steps |
Key Sequence |
Screens |
| 1. Set up Stats Tests |
STAT |
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| |
 twice |
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| |
APLHA, then x -1 key (for 2SampFTest...) |
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| 2. Select Data |
use right arrow key (if necessary) to move cursor to Stats, then ENTER |
|
| 3. Enter standard deviation of sample 1 |
use down arrow key, enter s1, then ENTER |
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| 4. Enter size of sample 1 |
enter n1, then ENTER |
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| 5. Enter standard deviation of sample 2 |
enter s2, then ENTER |
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| 6. Enter size of sample 2 |
enter n2, then ENTER |
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| 7. Select appropriate test |
use right and left arrow keys to move
cursor to appropriate test, then ENTER |
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| 8. Calculate F–Test |
 once |
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| |
ENTER |
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| 9. Scroll down to find more calculations |
Press once |
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| In this case, the test was Ha: σ1 ≠ σ2;
the F statistic is 0.0817; the p–value is 0.0325; etc. |
| 10. Draw the test |
repeat steps 1 through 7 (the data should already be stored!), then
once, then ENTER |
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