find a z score such that 10 percent of the area under the standard normal curve is below that score.

Question

directrix · Answer

Do you know or can you find using your calculator the z-score that goes with .1000 area under the standard normal curve?

anonymous · Answer

I don't know how to do that, but i'll try

directrix · Answer

I use the chart. I'll find one online.

directrix · Answer

I am looking at this table: http://www.docstoc.com/docs/31299609/TABLE-A-Standard-normal-probabilities

directrix · Answer

This table has the area numbers for the lower percentages.

directrix · Answer

z = - 1.208 is what I see.

directrix · Answer

That does not seem low enough. Maybe we should check on another chart.

kropot72 · Answer

z = -1.28 is the correct value.

anonymous · Answer

it says the answer is -0.74

kropot72 · Answer

When z = -0.74 the area that is below that z-score is 22.96% of the area under the standard normal distribution curve.
There are three possible explanations for the discrepancy:
1) The question that is posted is not exactly the same as the original question.
2) The given answer is incorrect.
3) A combination of 1) and 2).