Average talk time between charges of a given cell phone is advertised as 4 hours. Let the

Question:

Average talk time between charges of a given cell phone is advertised as 4 hours. Let the standard deviation be 0.8 hour.
a. Use Chebyshev’s theorem to approximate the proportion of cell phones that will have talk time between 2.4 hours and 5.6 hours.
b. Assume a bell-shaped to approximate the proportion of cell phones that will have talk time between 2.4 hours and 5.6 hours.

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...