M = {9.4, 9.9, 9.9, 9.9, 10.0, 10.2, 10.2, 10.5}
The mean and standard deviation of the 8 numbers in M are 10.0 and 0.3 respectively. What percent of the 8 numbers are within 1 standard deviation of the mean?	Choose the most appropriate option
A) 70%	B) 75%	C) 80%	D) 85%	E) 90%
If mean of the 8 numbers in M is 10.0 &amp; standard deviation 0.3,   the number that lie within the 1st standard deviation (M - SD to M + SD)   range from 9.7 to 10.3 (both inclusive)   The numbers in this set in that range are 6/8 or 75%   Ans : (Option 75%)
<result>B</result>
M = {9.4, 9.9, 9.9, 9.9, 10.0, 10.2, 10.2, 10.5}
The mean and standard deviation of the 8 numbers in M are 10.0 and 0.3 respectively. What percent of the 8 numbers are within 1 standard deviation of the mean?