SCCoast, an Internet provider in the Southeast, developed the following frequency distribution on the age of Internet

Question:

SCCoast, an Internet provider in the Southeast, developed the following frequency distribution on the age of Internet users. Estimate the mean and the standard deviation.

Age (years) Frequency

10 up to 20......... 3

20 up to 30......... 7

30 up to 40......... 18

40 up to 50 .........20

50 up to 60......... 12

Distribution
The word "distribution" has several meanings in the financial world, most of them pertaining to the payment of assets from a fund, account, or individual security to an investor or beneficiary. Retirement account distributions are among the most...