I think if you are measuring something with an underlying normal distribution in the population (like IQ), you would not get a normal curve just focusing on the >70th percentile unless you were having a very select group of test-takers sit for it (like people who had previously scored in the 80s). In most cases I think you would still see a skewed and not normal distribution.

Last edited by Ocelot; 09/30/16 06:16 PM.