Scores on the GRE​ (Graduate Record​ Examination) are normally distributed with a mean of 554 and a standard deviation of 120. Use the 68-95-99.7 Rule to find the percentage of people taking the test who score between 434 and 674

Answer 1

It is ± 1 SD. Use the rule.

Answer 2

PsyDAG, is it 68/2=34 or
100-68=32 or
68%
Please explain, I'm confused on this part. Thanks

Answer 3

68%