Please help me to find out the Percentile.
I have attached an statistic question!

Thanks!! :)

Question

Please help me to find out the Percentile. 
I have attached an statistic question!

Thanks!! :)

anonymous · Answer

attachment

sirm3d · Answer

from the table of standard normal probabilities, the nearest z-value with p-value of 0.14 (14%) is -1.08
then use the equation $$x=\mu +z \sigma $$ to solve the IQ score x separating the lower 14% from the upper 86%

anonymous · Answer

Ohh, Thanks! let me try it!! Hold on..

anonymous · Answer

I can't plug it in...

sirm3d · Answer

just replace mu, z, and sigma by the values 105, -1.08 and 15 respectively.

anonymous · Answer

Like, =105+(-1.08) 14

sirm3d · Answer

1 think  sigma = 15

anonymous · Answer

Ohh yes!

anonymous · Answer

So, how you got the -1.08? i been looking on the table and I can't find it.

anonymous · Answer

Got it.... I remember now.... this one was the other way.

sirm3d · Answer

that would be some explaining to do. it depends on which region is shaded in the figure provided in the table of standard normal probabilities

sirm3d · Answer

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