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Unformatted text preview: st 10
times bigger than the sample size.
Independence: Each observation or measurement must
have no inﬂuence on any others.
Null hypothesis: H0 is true Hypothesis Testing for Population Proportions Hypothesis Testing for Population Proportions Steps in Conducting a Hypothesis Test
Hypothesis Test for a Single Population Proportion
Hypothesis Test for Diﬀerence in Two Population Proportions Step 3: Compute the Test Statistics
ˆ
Take a sample and ﬁnd the sample statistic: p .
Calculate the test statistic
Recall H0 :p = p0
zobserved = Observed − Null
SE zobserved = ˆ
p − p0
p0 (1−p0 )
n Hypothesis Testing for Population Proportions Hypothesis Testing for Population Proportions Steps in Conducting a Hypothesis Test
Hypothesis Test for a Single Population Proportion
Hypothesis Test for Diﬀerence in Two Population Proportions Step 3: Compute the Test Statistics
ˆ
Take a sample and ﬁnd the sample statistic: p .
Calculate the test statistic
Recall H0 :p = p0
zobserved = Observed − Null
SE zobserved = ˆ
p − p0
p0 (1−p0 )
n Hypothesis Testing for Population Proportions Hypothesis Testing for Population Proportions Steps in Conducting a Hypothesis Test
Hypothesis Test for a Single Population Proportion
Hypothesis Test for Diﬀerence in Two Population Proportions The Meaning of the Test Statistics The test statistic, zobserved , tells us how unlikely that
sample proportion could have happened by random
chance had the null hypothesis been true.
If the null hypothesis is true, then the test statistic should
be close to 0.
Therefore, the farther the test...
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 Spring '08
 Ioudina

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