Zola Has Designed a Personality Test

Zola has designed a personality test.After giving it to a large sample,it looks like the test produced a normally shaped frequency distribution.The test had a mean of 50 and standard deviation of 10.Zola wants to find the two scores of this normal distribution that would cut off the central 68.26 percent of the scores.The lower score would be __________ and the higher score would be ____________.

A) .85;115
B) 40;60
C) 45;55
D) One cannot determine the scores from the information given.