9.5 , 9.8 , 9.9 , 9.9 , 9.9 , 10.2 …

9.5 , 9.8 , 9.9 , 9.9 , 9.9 , 10.2 , 10.3 , 10.5 The mean and the standard deviation of the 8 numbers shown above is 10 and 0.296 respectively. What percent of the 8 numbers are within 1 standard deviation of the mean?

This problem refers to a figure in its source book that isn't reproduced here.

AQuA-RAT — Algebra Question Answering with Rationales (Ling et al., DeepMind, 2017) · train #14410