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3. The dichotomous population consists of all college students, with the two categories being those who
would answer YES to the question “Is CSI your favorite TV show?” and those who would answer NO.
Let
p
be the proportion of college students who would answer YES.
H0:
p
= 0.45 vs. Ha:
p
< 0.45.
4. The dichotomous population consists of all automobile fatalities in the state of CT, with the two
categories being the ones that ARE alcohol related and those that ARE NOT.
Let
p
be the proportion of automobile fatalities that are alcohol related.
H0:
p
= 0.41 vs. Ha:
p
> 0.41.
The Paired Difference Experiment
Population 1 – All students who take the LSAT without any prep course
Population 2 – All students who take the LSAT after taking this prep course
Variable – LSAT score
μ1 – Average LSAT score in Population 1
μ2 – Average LSAT score in Population 2
Is μ1 < μ2?
Two methods of collecting pertinent data:
(1) Obtain a random sample from Population 1 and independently obtain another random sample from Population 2. (2) A random sample of law
school aspirants is selected. They are given the LSAT and their
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View Full Documentscores are recorded. They then take the
prep course, following which they are
given the LSAT again and their scores
on the retake are recorded. The two sets
of scores are
dependent
.
Comparison of two population means
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 Spring '10
 Segerson
 Microeconomics

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