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AP STAT: BVD Notes #7
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Terms in this set (10)
any numerical quantity that characterizes a given population or some aspect of it
parameter
calculated from the population
parameter
the practice or science of collecting or analyzing numerical data to infer proportions
statistic
calculated from sample
statistic
represents the model parameter, probability of success
p
represents the observed proportion in a sample
p hat
how much the data varies from sample to sample; is measured by standard error
sampling variability
in an SRS, what is true about the sampling distribution of p hat when the sample size increases?
modeled by a normal model, becomes a better representation, varies independently
in an SRS, what is the mean of the sampling distribution of p hat?
N (p hat) = p
in an SRS, what is the standard deviation of the sampling distribution of p hat?
square root of pq/n
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