Find the z value such that 91% of the standard normal curve lies between -z and z. (Round your answer to two decimal places) z = Sketch the area described.
Added by Matthew N.
Step 1
So if 91% of the data lies between -z and z, that means 9% of the data lies outside this range. Since the curve is symmetric, this 9% is split evenly between the two tails of the distribution, so each tail contains 4.5% of the data. Show more…
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