Graziano & Raulin
Research Methods (9th edition)
Z = (50 - 35) / 10 = +1.50
Drawing the figure shows that the Z-score is above the mean.
We look up +1.50 in the standard normal table. Since we are above
the mean, we want to find the proportion between the mean and that
Z-score and add it to .5000.
That proportion is .4332.
Therefore, the percentile rank is (.5000 + .4332)*100 = 93% (rounded
to the nearest whole number).