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The number of adult Americans who smoke

The number of adult Americans who smoke 11) The number of adult Americans who smoke continue to drop. Here are estimates of the percents of adults (age 18 and over) who were smokers in the years between 2000 and 2015:Yearx200020022006200920132015% of smokery23.122.520.820.619.820.2Make a scatterplot of these dataDescribe the direction, form, and strength of the relationship between percent of smokers and year. Are there any outliers?Use your calculator to findx,y,sx,sy, r.Use this information to find the least-squares regression line for predicting percent of smokers from yearAccording to your regression line, how much did smoking decline per year during this period, on the average?Use your regression line to predict the percent of adults who will smoke in 2050. Why is your result impossible? Why was it foolish to use the regression line for this prediction?12) The Nurses’ Health Study has interviewed a sample of more than 100,000 female registered nurses every two years since 1976. The study finds that “light-to-moderate drinkers had a significantly lower risk of death” than either nondrinkers or heavy drinkers. The Nurses’ Health Study is(a) an observational study. (b) an experiment. (c) Can’t tell without more information.(Explain your choice and your reason for your selection—no credit for just selecting one without proper explanation).