Answered: Car Window Skin Cancer? A study…

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

Car Window Skin Cancer? A study suggests that exposure to UV rays through the car window may increase the risk of skin cancer. The study reviewed the records of all 1050 skin cancer patients referred to the St. Louis University Cancer Center in 2004. Of the 42 patients with melanoma, the cancer occurred on the left side of the body in 31 patients and on the right side in the other 11. A. Is this an experiment or an observational study? B. Of the patients with melanoma, what proportion had the cancer on the left side? Show what numbers you divide and give answer to 3 decimal places. C. A bootstrap 95% confidence interval for the proportion of melanomas occurring on the left is 0.579 to 0.861. Clearly interpret the confidence interval in the context of the problem. D. Suppose the question of interest is whether melanomas are more likely to occur on the left side than on the right. That is, are over 50% of melanomas on the left side? Ho: p = 0.5 Ha: p > 0.5 Use the confidence interval given in part (C) to predict the results of the hypothesis test in part (D). Explain your reasoning.

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