## Related questions with answers

Besides their known long-term effects, do cigarettes also cause short-term illnesses such as colds? To help answer this question, a sample of smokers was drawn. Each person was asked to report the average number of cigarettes smoked per day and the number of days absent from work due to colds last year. Determine the regression line

Solution

VerifiedThe goal of this task is to use the values we are given in the excel table. We are given $231$ different values of the number of cigarettes smoked and $231$ different values for the number of days that the person has been absent from work which means the value of $n$ is $231,$ that is they have chosen $231$ different people to collect that data. In this case, the days of absence from work will change as the number of smoked cigarettes per day is changing. That means the days of absence will be a dependent variable, $y$ and the number of cigarettes smoked per day will be an independent variable $x$. Using those values we are given we have to determine the regression line and conclude the relationship between the number of smoked cigarettes and the number of days of absence from work.

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