mean 92.5, sd 11.25

1) what proportion sits between 69.5 and 103.75

2) scores greater than 125 have severe impairment. what proportion can be described as having severe impairment

3) 7.12% are listed as moderately or severely impaired. what is the cut-off score for moderate impairment

4) with ref to (2) what proportion of population have severe impairment but not more than 3 std deviations from mean