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jlh_05 · Nov 12, 2007, 07:18 AM

I don't understand this whole Z curve stuff could someone explain it to me and help with this example question

Find the area under the Z curve corresponding to the each of the z values described below.
your answer should be accurate to at least four decimal places.

A) less than -0.61
B) greater than -1.82
C) between -0.54 and -0.07
d) between -0.60 and2.18
E)between 0.66 and 1.22

red_cartoon · Nov 20, 2007, 10:23 AM

Normal distribution is expressed as : $\frac{1}{sqrt{2 \pi\sigma^2}} e^{\frac{-(x-\mu)^2}{2\sigma^2}}$

I believe you are to find the area under this curve when $\sigma=1, \mu=0$ using definite integration. For example, in (A) limit should be -ve infinity to -0.61 .

terryg752 · Nov 21, 2007, 05:34 AM

The difficulty is that such ideas to lot of time to explain which requires more than we can
Do on this site.

Giving you answers to questions may get you over the immediate hurdle but will do nothing for you in the long harm.

There is no short-cut to knowledge, but you may benefit from a private tutor.