I have no idea what these numbers are supposed to be.
If you are finding the z-score, your mathematical form is really bad
z-score for 11.33 = (11.33-8.27)/1.53 = 2
I you are using tables, a z-score of 2 has value of .9772
that is 97.72% will have a shoe size below 11.33
which means that .0228 or 2.28% have a shoe size above 11.33
Your best bet for these questions is the webpage
http://davidmlane.com/hyperstat/z_table.html
(never seen any shoe size other than multiple of 1/2's . e.g. 9 1/2 )
what percentage of women have shoe sizes greater than 11.33 if the mean is 8.27 and the deviation is 1.53?
11.33-8.27=3.06/1.53=2
95/2=47.5
50-47.5=2.5
1 answer