Assume that the variable under consideration has a density curve. The area under the density curve that lies between 18 and 22 is 0.625. What percentage of all possible observations of the variable are either less than 18 or greater than 22?

Answer 1

Ummhhh, if .625 or 62.% of the area is between 18 and 22
how much of the area would you think lies outside that boundary??

Answer 2

I believe it's 0.625

Answer 3

I think not
62.5 % is inside
the rest is outside
so what percent is outside ?