Question 1166483
half the scores are les than the mean,'
68% of the scores are between -1 and +1 sd, so 16% on each side are outside that value.  It would be 16% score fewer than a 69.
0.025 score greater than or equal to 90 so 0.975 or 97.5%score less than 90.
and 0.84 or 84% score less than 83.