The following are the times to failure of 38 light bulbs, given in hours of operation. (a)

Question:

The following are the times to failure of 38 light bulbs, given in hours of operation.

(a) Dropping the rule that class intervals must be equal, construct a frequency distribution from these data.
(b) Can you find the class mark of every class?

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...