Adult IQ scores have a bell-shaped distribution with a mean of 100 and a standard deviation of 15. Use the Empirical Rule to find the percentage of adults with scores between 55 and 145.

Question

anonymous · Answer

@tjdenerson It's pretty much the same with your last post, why don't you try? I'll check it!

anonymous · Answer

is it68%

anonymous · Answer

ok

anonymous · Answer

i  thinbk i got it 99.7%

anonymous · Answer

im trying is it in the 90s

anonymous · Answer

Why don't you show your calculation HERE as I've showed you from the previous post?

kropot72 · Answer

@tjdenerson is correct with the answer 99.7%. This is the percentage that fall within plus and minus 3 standard deviations of the mean.

anonymous · Answer

@kropot72 I want to make sure he understand what he's doing !

kropot72 · Answer

I appreciate that. But @tjdenerson obviously followed the "empirical rule" as stated in the question.

anonymous · Answer

Okie, pls take it over!