Assume that you plan to use a significance level of α = 0.05 to
test the claim that p1 = p2. Use the given sample sizes and numbers
of successes to find the z test statistic for the hypothesis
test.
In a vote on the Clean Water bill, 44% of the 205 Democrats voted
for the bill while 42% of the 230 Republicans voted for it.
Given:
= 0.05,
Democrats voted:
n1 = 205, = 44% =
0.44,
= 1 -
= 1 - 0.44
= 0.56
Republican voted:
n2 = 230, = 42% =
0.42,
= 1 -
= 1 - 0.42
= 0.58
Q = 1-P = 1 - 0.43 = 0.57
Test statistic:
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