Key Formulas for mid-term

# Key Formulas for mid-term - Key Formulas for mid-term...

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Key Formulas for mid-term examination Descriptive Statistics 1. Sample mean : n i i x n x 1 1 2. Median : value in position .5(n+1) in order of magnitude 3. Range : largest – smallest 4. Lower quartile, Q L : value in position .25(n+1) in order of magnitude 5. Upper quartile, Q U : value in position .75(n+1) in order of magnitude 6. Percentiles: 100pth percentile is value in position p(n+1) in order of magnitude 7. Sample variance and Sample standard deviation: n i i n i i x x n s x x n s 1 2 1 2 2 ) ( 1 1 ; ) ( 1 1 8. Computational formula for s :   n i n i i i x n x n s 1 2 1 2 1 1 1 or  n i i x n x n s 1 2 2 1 1 9. Coefficient of variation: % 100 CV x s 10. Box Plot: spread - H 5 . 1 fence inner Lower spread - H 5 . 1 fence inner Upper 1 3 Q Q spread - H 3 fence outer Lower spread - H 3 fence outer Upper 1 3 Q Q

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Probability 1. Conditions on simple events: 1 ) ( 0 i E P
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Key Formulas for mid-term - Key Formulas for mid-term...

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