3. Using the standard normal distribution table, find the probability values of the following:

P(z < 1.8)

P( z > 1.8)

P(> -2.37)

P(1.76 < Z > 2.57)

any idea how to start this

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- April 5th 2011, 04:15 PMmath321The normal distribution
3. Using the standard normal distribution table, find the probability values of the following:

P(z < 1.8)

P( z > 1.8)

P(> -2.37)

P(1.76 < Z > 2.57)

any idea how to start this - April 5th 2011, 04:25 PMpickslides
look here

Z table - Normal Distribution - April 5th 2011, 04:31 PMmath321
is there a tutorial i can get

with formulas and stuff without using jus the calculator - April 5th 2011, 04:36 PMpickslides
Nope, this is just an exercise of reading values from a table or using technology to get the values.

If you have it just use excel

P(z < 1.8)

Code:`=normsdist(1.8)`

P( z > 1.8)

Code:`=1-normsdist(1.8)`

P(> -2.37)

Code:`=1-normsdist(-2.37)`

P(1.76 < Z > 2.57) do you mean P(1.76 < Z < 2.57) ? if so

Code:`=normsdist(2.57)-normsdist(1.76)`

- April 5th 2011, 06:26 PMmath321
=normsdist(1.8)

got 0.4641 on the table

now what to do from there - April 5th 2011, 06:27 PMmath321
also got to do a sketch

- April 5th 2011, 06:43 PMpickslides
- April 5th 2011, 06:57 PMmath321
so i have to add .5

is dat it - April 5th 2011, 07:03 PMmath321
and for this 1 P( z > 1.8)

will it be .5 - .4691

or 1 - .4691 - April 5th 2011, 07:12 PMpickslides
- April 5th 2011, 07:13 PMmath321
yep slightly better

and for this 1 P( z > 1.8)

will it be .5 - .4691

or 1 - .4691 - April 5th 2011, 07:16 PMpickslides
- April 5th 2011, 07:22 PMmath321
can u give me an idea of how the graph will look please

starting to understand a little more - April 5th 2011, 07:27 PMpickslides
The curve is in these links,

Z table - Normal Distribution

Free Normal Curve Z-Score Calculator - April 5th 2011, 08:13 PMmath321
for this 1 P(> -2.37)

i got 1 - 0.0089 = .9911