Scores on a test have a mean of 70 and q3 is 83. the scores have a distribution that is approximately normal. find p90. (you will need to first find the standard deviation.)
a) 95.6
b) 92.9
c) 94.8
d) 93.7
a) 95.6
b) 92.9
c) 94.8
d) 93.7