In a recent study, a researcher wanted to find out if smoking have negative effects in health. A study was conducted over 10 years where they analyzed the number of cigarettes people were smoking per week and their life expectancy. The finding are as follows:Number of cigarettes versus life expectancy in years# cigarettes52325481784261119143529423353life expectancy (years)8078605385847379817568725892656278 Find the correlation coefficient, r, and explain its strength and direction.Show all the steps to show if there is a correlation between the number of cigarettes Predict the life expectancy for someone who smokes 20 cigarettes per week, and explain what your answer means.If appropriate, what is the Regression equation (Best-Fit-Prediction-Line)If appropriate, explain the slope of this lineIf appropriate, explain the y-intercept of this line?

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Answered: In a recent study, a researcher wanted…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

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In a recent study, a researcher wanted to find out if smoking have negative effects in health. A study was conducted over 10 years where they analyzed the number of cigarettes people were smoking per week and their life expectancy. The finding are as follows:

Number of cigarettes versus life expectancy in years

# cigarettes	5	23	25	48	17	8	4	26	11	19	14	35	29	4	23	35	3
life expectancy (years)	80	78	60	53	85	84	73	79	81	75	68	72	58	92	65	62	78

Find the correlation coefficient, r, and explain its strength and direction.
Show all the steps to show if there is a correlation between the number of cigarettes
Predict the life expectancy for someone who smokes 20 cigarettes per week, and explain what your answer means.
If appropriate, what is the Regression equation (Best-Fit-Prediction-Line)
If appropriate, explain the slope of this line
If appropriate, explain the y-intercept of this line?

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