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"
Economics 321: Midtenn Exam
Fall 1995
Dr. Coughlin
1. For simple random sampling we can state with approximately 95% confidence that
where
a)
b)
c)
d)
e)
1t = sample proportion, P = population proportion, n = sample size
1t = population proportion, P = sample proportion n = sample size
1t = population proportion, P = sample proportion, n = population size
1t = sample proportion, P = population proportion, n = relative frequency
none of the above
2. True or False? When calculating a confidence interval from a sample, we are using
deduction to make a statement about an unknown population.
a) True
b) False
3. A random sample of 1,500 Americans in 1980 were asked, "Do you think the use of
marijuana should be made legal?'" Broken down by gender, here are the number
of respondents ( roughly reconstIUcted from the Gallup Poll):
GENDER
ANSWER MEN WOMEN Totals:
yes 240 155 395
no 485 620 1105
Totals: 725 775 1500
The proportion of Americans who favored legaliza...

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