The arithmetic mean and standard deviation of a certain normal distribution are 14.5 and 1.7, respectively. What value is exactly 2 standard deviations less than the mean?	Select the correct option:
A) 10.5
B) 11
C) 11.1
D) 12
E) 12.5
Mean = 14.5   Two standard deviations is 1.7 + 1.7= 
<gadget id="calculator">1.7 + 1.7</gadget>
<output>3.4</output>
3.4   There could be two calues for this.   Mean + two standard deviations= 17.9   Mean - Two standard deviations = 11.1   Answer choice has 11.1 and so 11.1 is the answer.
<result>C</result>
The arithmetic mean and standard deviation of a certain normal distribution are 14.5 and 1.7, respectively. What value is exactly 2 standard deviations less than the mean?