AP Stats 7.1 and 7.2

A ________ describes a characteristic of a population, while a ________ describes a characteristic of a sample

parameter, statistic

The ________ is the distribution of values taken by a statistic in all possible samples of the same size from the same population.

sampling distribution

A statistic is a(n) ________ of a parameter if the mean of its sampling distribution is equal to the true value of the parameter.

unbiased estimator

The ________ (p̂) is calculated as (number of successes in the sample) / (total sample size).

sample proportion

The mean of the sampling distribution of p̂ (μp̂) is equal to ________.

population proportion (p)

σp̂ = √(( _______ )/n

p(1-p)

The sampling distribution of p̂ is approximately Normal if np ≥ ____ and n(1-p) ≥ ____.

10

The ________ (σp̂) measures the typical distance of sample proportions from the mean of the sampling distribution.

standard deviation

The goal of examining a sampling distribution is to understand the ________ of the statistic and to determine whether it is an ________ of the parameter of interest.

variability, unbiased estimator

Be careful to use the correct words and symbols to distinguish between ________ and ________ .

populations, samples