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15 Cards in this Set

  • Front
  • Back
data deals with categories
data deals with numeric values (quantities)
Chebyshev's theory
(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
Empirical Rule
(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
is the event that occurs if either A or B or both occure on a single performance of the experiment
is the event that occurs if both A and B occur on a single perfomance of the experiment
is merely the opposite of the event
Compliment rule
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.
Additive rule
P(AUB)= P(A)+ P(B) -(PIA)
mutually exculsive
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
discrete random variable
one where there is a finite (and there for countable) number of distinct possible values. (0,1,2,3)
continuous random variable
one where for any two values of that variable there are an infinte number of other possible values in between.
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
Multiplicative rul
PIA= P(A)P(B/A)= P(B)P(A/B)
Be Faithful and