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Economics: exam 1
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Economics Exam 1
292 terms
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Economics Exam 1
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Algebra 2: A Common Core Curriculum
Boswell, Larson
5,067 explanations
Geometry: A Common Core Curriculum
Boswell, Larson
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economics
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PROBABILITY
The sample mean and sample standard deviation on your economics examination were 60 and 20, respectively; the sample mean and sample standard deviation on your statistics examination were 55 and 10, respectively. You scored 70 on the economics exam and 62 on the statistics exam. Assuming that the two histograms of test scores are approximately normal histograms, (a) on which exam was your percentile score highest? (b) approximate the percentage of the scores on the economics exam that were below your score. (c) approximate the percentage of the scores on the statistics exam that were below your score.
STATISTICS
In Professor Friedman's economics course, the correlation between the students' total scores before the final examination and their final examination scores is r = 0.6. The pre-exam totals for all students in the course have mean 280 and standard deviation 30. The final-exam scores have mean 75 and standard deviation 8. Professor Friedman has lost Julie's final exam, but knows that her total before the exam was 300. He decides to predict her final exam score from her pre-exam total. Use the least-squares regression line to predict Julie's final-exam score.
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Economics Exam 1
Mizzou · Columbia, MO
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economics exam 1
University of Delaware · Newark, DE
2 study sets
1 member