Suppose that the average student buys 12 books a year. You have a theory that by offering adiscount you can increase that number. You run a pilot project by offering the discount to arandom sample of 25 students and you find that x = 14 and s = 4.32State the null and alternative hypothesesGive the first symbol in the expression for Ho You could use the confidence interval approach to solve this problem.TrueFalse

Answered: Image /qna-images/answer/b3c5d4ea-08d7-43db-90b6-fbd02e645722.jpg

Answered: Suppose that the average student buys…

Exploring Economics

8th Edition

ISBN:9781544336329

Author:Robert L. Sexton

Publisher:Robert L. Sexton

Chapter1: The Role And Method Of Economics

Section: Chapter Questions

Problem 5P

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The following model studies human welfare using the General Social Survey in the US: happy = 0.014 + 0.209regattend + 0.103occattend + 0.027income + 0.009educ +0.003 female where happy is a dummy variable equal to one if a person is happy, and 0 otherwise: regattend is a dummy variable equal to one if a person regularly attends church, and 0 otherwise: occattend is a dummy variable equal to one if a person occasionally attends church, and 0 otherwise; income is family income in tens of thousands: educ is years of schooling: female = 1 if female. = 0 otherwise Interpret the impact of religion on happiness.
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Is there any graph that can support this answer?
.A researcher is collecting individual data by asking visitors in a train station in a medium sized town to fill in a questionnaire. It takes nearly 30 minutes to complete the survey questions. To encourage higher participation rate, the researcher provides a small financial incentive that is enough to buy a sandwich. The researcher wants to use this sample to make predictions about effect of using social media on health among the residents of the town. a. Explain the random sampling assumption, that is one of the Gauss-Markov assumptions for linear regressions. b. Do you think this assumption is satisfied in the sample collected by the researcher? c. What are the possible consequences of violation of random sampling assumption for predictions based on this sample?
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A shopper wanted to test whether there was a difference in the average waiting times at the check-out counter among 5 different supermarkets. She selected a random sample of 20 shoppers from each of the five supermarkets. i. What is the null hypothesis for this situation? OThe average waiting time to check out is 25 minutes for all five supermarkets OThe average waiting time for each of the 100 shoppers is different. ONone of these OThe average waiting time to check out is the same for all five supermarkets OThe average waiting time to check out is not the same for all five supermarkets. ii. What is the alternative hypothesis for this situation? OThe average waiting time to check out is 25 minutes for all five supermarkets OThe average waiting time to check out is the same for all five supermarkets OThe average waiting time for each of the 100 shoppers is different. ONone of these OThe average waiting time to check out is not the same for all five supermarkets.

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