Need actual assistance with statistics problem as have not had these classes in 30 years

Question

Cost of widgets follows a bell curve. The mean cost of a widget is $387, with a standard deviation of $19. Between what two values do about 68% of the widgets cost?

Answer 1

387 plus and minus 19

= 368 to 406

Use the "empirical rule" 68-95-99.7, for 1, 2 and 3 standard deviations from the mean

68% of all data falls within 1 standard deviation from the mean

that's 387-19 to 387+19

or

368 to 406

95% falls within 2 standard deviations from the mean

99.7% falls within 3

or you can use z tables and get a more precise number. You can find z tables and z calculators on line. Just punch in the numbers and voila out pops the answer Or a scientific calculator with statistics functions works too, which also give you a graph.

real question though is how many standard deviations from the mean are you in age? there's actually no limit. It goes forever. Eternity.