A city wants to know if a new advertising campaign to make citizens aware of the dangers of driving after drinking has been effective. The accompanying table Next question of drivers who have been stopped with more alcohol in their systems than the law allows for each day of the week in the week before and the week a month after the campaign starts. Assume that the data from each population is Normally distributed. Complete parts a through i below. Click the icon to view the counts of stopped drivers. a) Are the data paired? Explain. Choose the correct answer below. A. No, they are not paired because the drivers are independent of each other. O B. Yes, because the before counts were compared to the counts after the advertisement. O C. Yes, because each day of the week was compared before and after the advertisement. X Data table b) Compute the mean difference. Find the mean difference of (before - after). d= drivers Day of the Week Before After (Round to three decimal places as needed.) c) Compute the standard deviation of the differences. O JAOUI 6 6 00 WUT A N So = 0 (Round to three decimal places as needed.) d) Compute the standard error of the mean difference. SE (d) = (Round to three decimal places as needed.) Print Done e) Find the value of the t-statistic. t= (Round to three decimal places as needed.)0 How many degrees of freedom does the tstatistic have? dl= 9) Is the alternative one- or two-sided? Explain Choose the correct answer below. 0 A. It is two-sided. because the city wants want to know it the advertisement changed the number of drunk drivers. 0 C. It is one-sided. because the city wants to know if the advertisement changed the number of drunk drivers h) What is the P-value associated with this t-statistic? Assume that the other assumptions and conditions for inference are met. Pvalue = (Round to three decimal places as needed.) i) At a = 005. what do you conclude? Ho. There '7' sufcient evidence to conclude that the advertising Iwered the mean number of drunk drivers on the road. O B, It is one-sided, because the city vants to know if the advertisement lowers the number of drunk drivers. 0 D, It is two-sided. because the city wants to know it the advertisement lowers the number of dmnk drivers