For health reasons, homes need to be inspected for radon gas that decays and produces alpha particles.

Question:

For health reasons, homes need to be inspected for radon gas that decays and produces alpha particles. One device counts the number of alpha particles that hit its detector. To a good approximation, in one area, the count for the next week follows a Poisson with mean 3. Determine
(a) The probability of 5 next week.
(b) The variance and standard deviation.
(c) The probability of 12 in three weeks.
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...