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- Aug 14th 2007, 05:10 PMSmokey007Last stat prob, I promise! heh
Thanks

- Aug 14th 2007, 09:23 PMSmokey007
need some help :(

a. p(x>570)

z509 = 570-509/112 = .54 - Aug 14th 2007, 09:55 PMCaptainBlack
p(z>(570-509)/112) = p(z>0.545) = 1 - p(z<0.545) ~= 1-0.707 = 0.293

Quote:

b. If 100 men are randomly selected, find the probability that their mean SAT verbal score is more than 570.

So we want:

p(z>(570-509)/11.2) = p(z>5.45) ~= 0.

RonL