4. A random survey was conducted in order to determine whether the recent campaign to pro- mote newspaper recycling is effective. Out of a sample of 200 households in the town, there were 160 households that recycled their newspapers. Before the campaign, 70% of households in the town recycled their newspapers. (a) Construct 95% confidence interval for the percentage of the households that recycled their newspaper. (b) Are there any substantial evidence that the new campaign is effective? Answer the question at significant level 5 % by i) stating the null hypothesis and alternative hypothesis; ii) computing the observed significant level (P-Value). (c) What is the power of the test in (c) at p = .75?

4. A random survey was conducted in order to determine whether the recent campaign to pro- mote newspaper recycling is effective. Out of a sample of 200 households in the town, there were 160 households that recycled their newspapers. Before the campaign, 70% of households in the town recycled their newspapers. (a) Construct 95% confidence interval for the percentage of the households that recycled their newspaper. (b) Are there any substantial evidence that the new campaign is effective? Answer the question at significant level 5 % by i) stating the null hypothesis and alternative hypothesis; ii) computing the observed significant level (P-Value). (c) What is the power of the test in (c) at p = .75?

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018

18th Edition

ISBN:9780079039897

Author:Carter

Publisher:Carter

Chapter4: Equations Of Linear Functions

Section: Chapter Questions

Problem 8SGR

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