ESSENTIALS OF ECONOMICS
ESSENTIALS OF ECONOMICS
4th Edition
ISBN: 9781464188466
Author: KRUGMAN
Publisher: Norton, W. W. & Company, Inc.
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Chapter P1, Problem 2.1BC
To determine

Opportunity cost of a worker wandering around the floor

Concept Introduction

Opportunity cost: Opportunity Cost is the loss of benefit incurred by a person by choosing an alternative course of action. It is the benefit given up when an option is rejected during decision making and another option is selected.

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A statistics teacher wants to see if there is any difference in the performance of students on the final exam if she gives them orange jelly beans before the exam. She has a theory that orange jelly beans will change the results, but she isn't sure in which direction. She knows that the population mean score on the exam when students do not have orange jelly beans is 85 and that exam scores have an approximately symmetric distribution. She gives orange jelly beans to 25 randomly selected students and finds that these students had a sample mean score of 88 with a sample standard deviation of 5. She wants to have 99% confidence in her result.
A statistics teacher wants to see if there is any difference in the performance of students on the final exam if she gives them orange jelly beans before the exam. She has a theory that orange jelly beans will change the results, but she isn't sure in which direction. She knows that the population mean score on the exam when students do not have orange jelly beans is 85 and that exam scores have an approximately symmetric distribution. She gives orange jelly beans to 25 randomly selected students and finds that these students had a sample mean score of 88 with a sample standard deviation of 5. She wants to have 99% confidence in her result.
You take a random sample of five City College students and record what color shirt they are wearing. Here are the results: Black Blue Blue Blue Black Calculate a point estimate for the population proportion of City College students who wear blue shirts on any particular day, based on the data in this sample. Give the symbol used to denote this point estimate and the numerical value of the point estimate.
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