In a Gallup poll conducted in August 2010, a random sample of n = 1013 American adults were asked ‘‘Do you approve or disapprove of the way Congress is handling its job?” The proportion who said they approve is p̂ = 0.19, and a 95% confidence interval for Congressional job approval is 0.166 to 0.214. If we use a 5% significance level, what is the conclusion if we are:

(a) Testing to see if there is evidence that the job approval rating is different than 20%. (This happens to be the average sample approval rating from the six months prior to this poll.)

(b) Testing to see if there is evidence that the job approval rating is different than 14%. (This happens to be the lowest sample Congressional approval rating Gallup ever recorded through the time of the poll.)