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Confidence Intervals
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OpenStudy (anonymous):
A simple random sample of 400 households is taken in a large city, and the number of cars in each sampled household is noted. The average number of cars in the sampled households is 1.8 and the SD is 1.3. Among the sampled households, 10% had no car.
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OpenStudy (amistre64):
if only there was a question to go with this information ...
OpenStudy (caozeyuan):
do you want to construct a confidence interval or run a hypothesis test?
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