21. The Centers for Disease Control and Prevention Office on Smoking and Health (OSH) is the lead federal agency responsible for comprehensive tobacco prevention and control. OSH was established in 1965 to reduce the death and disease caused by tobacco use and exposure to secondhand smoke. One of the many responsibilities of the OSH is to collect 25 Rights Reserved. May be copied, scanned or duplicated, in whole or in pan. Due to clecom nights, some thurd party content may be suppressed from the eBook ander Chapters ed comien does not materially affect the overall leaming experience Cengag.comgreenies the right to remove additional comentat in rights res Problems 235 data on tobacco use. The following data show the percentage of U.S. adults who were users of tobacco for a recent 11-year period (http://www.cdc.gov/tobacco/data_statistics /tables/trends/cig_smoking/index.htm). Year 1 2 3 Percentage of Adults Who Smoke 22.8 22.5 21.6 20.9 20.9 20.8 19.8 20.6 20.6 19.3 18.9 9 10 11 a. Construct a time series plot. What type of patter exists in the data? b. Use simple linear regression to find the parameters for the line that minimizes MSE for this time series. c. One of OSH's goals is to cut the percentage of U.S. adults who were users of tobacco to 12% or less within nine years of the last year of these data. Does your regression model from part (b) suggest that OSH is on target to meet this goal? If not, use your model from part (b) to estimate the number of years that must pass after these data have been collected before OSH will achieve this goal