A survey was conducted in the United States and 10 countries of Western Europe to determine the percentage of teenagers who had used marijuana and other drugs. The results are summarized in the following table.only parts 4-7iv) Can you spot a country which contributes negatively to the association? If yes, explain how. v) The standard deviation of the percent of teens who have used marijuana is 15.55% and it is 10.24% for the percent who have used other drugs. Calculate the correlation between the percent of teens who have used marijuana and the percent who have used other drugs. Show the ”by hand” formula you may use. vi) What does the correlation coefficient confirm or specify? vii) Do these results allow you to say that marijuana is a ”gateway drug”, that is, that marijuana use leads to the use of other drugs? Explain A survey was conducted in the United States and 10 countries of Western Europe to determine thepercentage of teenagers who had used marijuana and other drugs. The results are summarized in thefollowing table.CountryCzech Rep.DenmarkEnglandFinlandIrelandItalyNo. IrelandNorwayPortugalScotlandUnited StatesPercent Who Have UsedOther Drugs43Marijuana221740537192367533421116814333124i) Create a scatterplot, by hand.ii) Write a brief description of the association seen from the scatterplot.iii) Calculate the mean percent of teens who have used marijuana and the mean percent who haveused other drugs?iv) Can you spot a country which contributes negatively to the association? If yes, explain how.v) The standard deviation of the percent of teens who have used marijuana is 15.55% and it is10.24% for the percent who have used other drugs. Calculate the correlation between the percentof teens who have used marijuana and the percent who have used other drugs. Show the "byhand" formula you may use.vi) What does the correlation coefficient confirm or specify?vii) Do these results allow you to say that marijuana is a "gateway drug", that is, that marijuana useleads to the use of other drugs? Explain.

Given the data between marijuana use and other drug use. We have to find the correlation coefficient…

Answered: A survey was conducted in the United…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

See similar textbooks

Related questions

Question

A survey was conducted in the United States and 10 countries of Western Europe to determine the percentage of teenagers who had used marijuana and other drugs. The results are summarized in the following table.

only parts 4-7

iv) Can you spot a country which contributes negatively to the association? If yes, explain how. v) The standard deviation of the percent of teens who have used marijuana is 15.55% and it is 10.24% for the percent who have used other drugs. Calculate the correlation between the percent of teens who have used marijuana and the percent who have used other drugs. Show the ”by hand” formula you may use. vi) What does the correlation coefficient confirm or specify? vii) Do these results allow you to say that marijuana is a ”gateway drug”, that is, that marijuana use leads to the use of other drugs? Explain