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15 Cards in this Set
- Front
- Back
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Qualitative
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data deals with categories
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Quantitative
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data deals with numeric values (quantities)
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Chebyshev's theory
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(applies to any datd set regardless of shape etc.)
At least 3/4 of the data will fall within 2 standard deviations of the mean At least 8/9 of the data will fall within 3 standard deviations of the mean Generally for any number k greater than 1 at least (1-1k2) of the datd will fall within k standard deviations of the mean |
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Empirical Rule
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(only if have a symmetic, mound shapes distribution)
approximately 68% of the data will fall within 1 standard deviation approximately 95% of the data will fall within 2 standard deviations approximately 99.7% (esentially all) of the data will fall within 3 standard deviations |
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Union
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is the event that occurs if either A or B or both occure on a single performance of the experiment
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Intersection
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is the event that occurs if both A and B occur on a single perfomance of the experiment
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Compliment
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is merely the opposite of the event
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Compliment rule
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P(A) + P(A)C =1
since the probabbility of an event and the probability of its compliment are the only two possibilities they will always add up to one. |
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Additive rule
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P(AUB)= P(A)+ P(B) -(PIA)
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mutually exculsive
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if AIB contains no smaple points that is A and B cannot occur at the same time. An event and its compliment will always be mutually exclusive
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discrete random variable
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one where there is a finite (and there for countable) number of distinct possible values. (0,1,2,3)
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continuous random variable
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one where for any two values of that variable there are an infinte number of other possible values in between.
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Binomial
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the experiement consists of n identical trials
there are only two possible outcomes on each trial the probability of S remains the same form trial to trial the trials are independent the binomial randomm variable x is the number of sucesses in n trials |
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Multiplicative rul
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PIA= P(A)P(B/A)= P(B)P(A/B)
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Be Faithful and
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Believe
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