Chapter 12: Testing Hypotheses About Proportions
• Null hypothesis: the claim being assessed in a hypothesis test.
o For a claim to be a testable null hypothesis, it must specify a value for
some population parameter that can form the basis for assuming a
sampling distribution for a test statistic.
o Denoted H 0 p=p 0 .
• Alternative hypothesis: the hypothesis that proposes what we should conclude if
we find the null hypothesis to be unlikely.
o Twosided alternative: an alternative hypothesis is twosided when we’re
interested in deviations in either direction away from the hypothesized
Denoted H :Ap≠ p 0 .
P is the probability of deviating in either direction.
o Onesided alternative: an alternative hypothesis is onesided when we’re
interested in deviations in only one direction away from the hypothesized
Denoted H :Ap>p 0 or H :Ap