Standardized test Something Great/tutorialoutletdotcom Test Z is a standardized test that all high school | Page 5

D) Campaign strategist Brown tells the press that he believes that a
majority of registered voters
support Senator Green. A sample of 200 registered voters finds that
112 answer “Yes” when
asked, “Do you support Senator Green?” Test campaign strategist
Brown’s claim that a
majority of registered voters support Senator Green.
You would _____ the null hypothesis at 10% significance level. You
would _____ the null
hypothesis at the 5% significance level.
reject, reject
reject, fail to reject
fail to reject, reject
fail to reject, fail to reject 6.
In a random sample of 100 registered female voters, 55 said they
supported Obama. In a
random sample of 100 registered male voters, 45 said they supported
Obama. Let’s denote the
respective population proportions as Px (female) and Py (male).
Determine whether or not these
results provide evidence that the population proportions are different
for the two groups. Here
are the null and alternative hypotheses:
H0: Px = Py
H1: Px ≠ Py A)
B)
C)