# Past Exam for ECON 321 - ECON STAT with Coughlin at Maryland (UMD)

## Exam Information

 Material Type: Mid-Term Professor: Coughlin Class: ECON 321 - ECON STAT Subject: Economics University: University of Maryland Term: Fall 1995 Keywords: Highest FrequencyMonetary ValueObservationsExclusive OrProbabilitiesRelative FrequencyConditionalNo CorrelationConsiderationSample Proportion      ## Sample Document Text

" 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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