Please help me to get the (B) part..
Statistics question is attached..

Thanks!! :)

Question

Please help me to get the (B) part.. 
Statistics question is attached..

Thanks!! :)

anonymous · Answer

attachment

anonymous · Answer

im pretty sure the answer is C

anonymous · Answer

Can give the easy way to get the b) part, the answer was 0.8100. and not sure why. I plugged the formula

anonymous · Answer

is there another part to part B

anonymous · Answer

Yes, there are A, B, C,. I got the A part good. and the C part

anonymous · Answer

okay ill try to help with part B

anonymous · Answer

I did it this way.

anonymous · Answer

$$\frac{ 168-159 }{ 29\sqrt{8} }$$

anonymous · Answer

sorry but i really don't know

anonymous · Answer

@jim_thompson5910, Sorry to bother you. Can you help me with Part B. What I am doing wrong?

jim_thompson5910 · Answer

I think it's 

(159 - 168)/(29/sqrt(8))

but I think you meant to write that

anonymous · Answer

Yes!.. I got different answer.

jim_thompson5910 · Answer

(159 - 168)/(29/sqrt(8)) = -0.8777

So you want to find P(Z > -0.8777)

jim_thompson5910 · Answer

this will give you 0.8100 when you round to 4 decimal places

anonymous · Answer

So it will be 1-0.8777? then,

anonymous · Answer

ooooohhh!!!! I got it...

anonymous · Answer

Ohh God!! This is horrible... jeejeeje

jim_thompson5910 · Answer

you'll get the hang of it

anonymous · Answer

It is funny... I was all morning trying to figure it out... It has to be you!! lol!

jim_thompson5910 · Answer

lol nah, it's just the timing, that's all

anonymous · Answer

Yes, its true, I apreciate all your help!!!

jim_thompson5910 · Answer

yw