The tobacco industry closely monitors all surveys that involve smoking. One survey showed that among 785 randomly selected subjects who completed 4 years of college, 18.3 % smoke. The 99% confidence interval for the true percentage of smokers of all people who completed 4 years of college is closest toA. (0.156 , 0.210 )B. ( 0.165 , 0.201 )C. ( 0.138 , 0.228 )D. ( 0.147 , 0.219 )E. ( 0.160 , 0.206

At the olympic games, many events have several rounds of competition. one of these events is the men's 100-meter backstroke. the upper dot plot shows the times (in seconds) of the top 8 finishers in the final round of the 2012 olympics. the lower dot plot shows the times of the same 8 swimmers, but in the semifinal round. which pieces of information can be gathered from these dot plots? (remember that lower swim times are faster.) choose all answers that apply: a: the swimmers had faster times on average in the final round. b: the times in the final round vary noticeably more than the times in the semifinal round. c: none of the above.