Usingthis as a reference answer the following question:

Baseline Descriptive Statistics for the Study Sample (n=111): Seattle, WA, December 2005-August 2008

VariableMean SD or %

Age, y (n=111) 48.43 9.51 (VariableMean SD or %)

Q: What is the mean age and standard deviation of the sample? What percentage of the sample is between 38.92 years old and 57.94 years old?

( I do not necessarily require a solution, I am just unsure as to what/which data to reference in this question [or if need be, how I might calculate this myself]). Thank you!