Question

In a standard normal distribution, about _________% of the scores fall above a z-score of 3.00

Answer 1

The normal rule to remember is 68-95-99.7, i.e. plus or minus three sigma corresponds to 99.7% of the probability. That leaves 0.3% in the two tails, or 0.15% in the tail above 3 sigma.

Answer: 0.15%