Question

Use a table to find the percentage of the area under the standard normal curve between the two values. Round your answer to the nearest tenth.

z = 0 and z = 1.89

Answer 1

What kind of table? The probability Z table?

Answer 2

Yeah

Answer 3

Well using this:

http://4.bp.blogspot.com/_5u1UHojRiJk/TEh9BHxxPUI/AAAAAAAAAIQ/DafeQNMYFoE/s1600/ztable.gif

0 on top, and ~1.89 on side, so 0.9713 sound about right?

Answer 4

No using this one 2nd page

Answer 5

Hmm, alright, lets see...

z=0 is 0.5, z= 1.89 is 0.9706

So if you want the area between them, 0.9706-0.5=0.4706, so 47.06%?

Answer 6

That's right thank you so much!! :)

Can you help me with one more?
Use a z-table to find the percentage of the area under the standard normal curve between the two values. Round your answer to the nearest hundredth.

z = –0.32 and z = 1.94

Answer 7

z=-.32 is 0.3745 and z=1.94 is 0.9738

So.. we want what is between them...

0.9735-.5 = 0.4735
0.5-0.3745=0.1225

^^This gets the distance from the center point 0.5 on either side

0.4735+0.1225=0.596 or 59.6% if i did the math right?