The mean number of popsicles sold on any given day is 15 with a standard deviation of 3 popsicles.

What is the percentage of popsicles that fall within 12 and 18 being sold?
A) 68%
B) 75%
C) 81.5%
D) 85%

Question

The mean number of popsicles sold on any given day is 15 with a standard deviation of 3 popsicles.

What is the percentage of popsicles that fall within 12 and 18 being sold?
A) 68% 
B) 75% 
C) 81.5% 
D) 85%

anonymous · Answer

Well, a process like this one will most likely approximate a normal distribution.  A normal distribution will usually have about 68 percent of the outcomes within one sigma (standard deviation).