In a survey of 2230 u. s. adults, 1272 think that air travel is much more reliable than taking cruises. construct a 95% confidence interval for the population proportion of u. s. adults who think that air travel is much more reliable than taking cruises.

What is the difference between regular convex and concave polygons

He that is measured at 220° is a reflex angle. the opposite angle is obtuse. find the measure of obtuse .

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.