women: mean:64
standard d.: 2.7
men: mean: 69.3
stardard d.: 2.8
can saomeone help me? i dont know how to start... i know that i have to draw the bell curve to make it easier but im not sure what to do... i would really appreciate help with the question since i have others similar ones and it would help me to answer them.
thank you!
2007-02-22 05:59:10 · 3 answers · asked by ro 2 in Science & Mathematics ➔ Mathematics
can you im me i will give detail on this
2007-02-22 06:05:45 · answer #1 · answered by AaSHEK 4 · 1⤊ 0⤋
you have to find the percent of the women that are taller that 69.3
for this you first find the z scores
z=x-mean/standard deviation
z=(69.3-64)/2.7~1.963
then normalcdf(1.963,99)~.025
approximate 2.5%
2007-02-22 06:11:23 · answer #2 · answered by Al3xa 2 · 0⤊ 0⤋
Y ~ height of a woman
P(Y>69.3) = 1- P(Y<=69.3).
P(Y<=69.3) = P( z <= (69.3 - 64)/2.7 ) = P (z <= 1.963 ) = .975
P(Y>69.3) = 1- .975 = .025
2007-02-22 06:09:21 · answer #3 · answered by Michael C 3 · 1⤊ 0⤋