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Interpreting a bell curve questions

The bell curve I am given is exactly the same as the one shown on the website listed below...
 
 
 
 
Questions
A.)  About what percentage of the population falls within -1 and -2 standard deviations from the mean?  I am not sure if the answer would be 47.7% (34.13 + 13.59) or just 13.59% because the wording of the question is confusing me.
 
B.)  About what percentage of the population falls below -2 standard deviations from the mean?  I think the answer is about 2.3% (.13 + 2.14) but I am not fully sure.
 
Any help is greatly appreciated, thank you for you time!
11/1/2013 | Leslie from Reno, NV | 1 Answer | 0 Votes
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1 Answer

A.) The wording is slightly ambiguous. Most likely, they mean between -1 and -2 standard deviations from the mean, which is just 13.59%. If, however, they mean within -1 and within -2 standard deviations from the mean, the answer should be "34.13% and 47.7%, respectively." You should ask for clarification.
 
B.) You are correct.
11/1/2013 | Andre W.