Answered: In a survey conducted by Wright State…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Question

In a survey conducted by Wright State University, senior high school students were asked if they had ever used marijuana. Of the 1120 females surveyed, 445 responded yes. Of the 1156 males surveyed, 515 responded yes. The researchers who conducted a survey were interested in knowing if there is a difference between genders in regards to having tried marijuana. 1. Is this an observational study or an experiment? Explain how you know, 2. Identify the explanatory and response variables, and classify them as categorical or quantitative. 3. Do you think random sampling was employed in this scenario? Explain your reasoning 4. Do you think random assignment was employed in this scenario? Explain your reasoning. 5. Write the hypotheses in symbols for this scenario. 6. Produce a 2x2 table of counts, with the explanatory variable in columns 7. Calculate the proportion of subjects who have tried marijuana based on gender.

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