Question 1180821
z for (17%) is -0.94, for 83% it is +0.954
So the middle 66% is between those two z values
z=(x-mean)/sd
-0.954=(x-70)/25/sqrt(32)
-0.954=(x-70)/4.419
x-70=-4.216, round to -4.22
x=65.78  and for the upper limit, 74.22
(65.78, 74.22)