Arelle

2 Questions
0 Answers

0

753

0

+8

What does this even mean?

Variable Y~N with a mean of 190 and a variance of 90
What is the 80 percentile, the 92 percentile, 98 percentile?
I thought it is supposed to specify if the percentiles are upper or lower. Does it even matter?
Please explain I'm so lost! <read more ..

Arelle Oct 7, 2013

0

878

2

+8

Please explain what I'm doing wrong!

For a probability question the equation answer in the back of the book says
P(5) = (7 C 5) x (.65)^2 x (.35)^5 = .0466.
I just don't know how that is the correct answer!
What does (7 C 5) mean, is it 7x5 = 35?
When I do this problem on read more ..

Arelle Oct 7, 2013