Interval estimates are a projection of the
range within which a population parameter will lie at a given level of
confidence based on a statistic obtained from a probabilistic sample
ÊThis probability is normally referred
to as the confidence level
ÊDrawing a probability sample allows for
the appropriate calculation of confidence intervals
Confidence Intervals for Proportions
A statement
about the value of a population
parameter developed for the
purpose of testing
Hypothesis
allows us to
calculate the probability of a particular result if the stated
hypothesis is actually accepted
statistical hypothesis test
ÊThe hypothesis that a
proposed result is not true for the population
ÊResearchers typically attempt to reject
the null hypothesis in favor of some alternative hypothesis
Null
Hypothesis (H0)
ÊThe hypothesis that a
proposed result is true for the population
ÊOften, we are interested in the
alternative hypothesis