Question

0 //흔른 oooO

Answer 1

solution=

2000 is the best choice. (option c)
The most likely standard deviation is 2000 ,since the band most likely played
to a very large audience once in addition to the normal smaller crowds.

This would put about 2 in 3 concerts (2/3 is quite close to 68%) with
attendance between 19359 and 23359 and most (95%) between 17359 and 25359. A standard
deviation of 20000 would imply about 68% of shows having between 359 and 41,359 as
attendance – and the problem states that concerts always drew a large crowd (values about 360
are ruled out). A standard deviation of 20 makes the attendance within 60 of 21,359 for almost
all concerts, which is hard to believe. A standard deviation of 200 is not the worst answer (partial
credit), but if that’s the value then attendance never falls outside of 20,759 to 21,959, which is
still a fairly narrow range – especially given that the band would be playing in venues (arenas,
probably) of a variety of capacities.