In the Month Preceding This Day, the Author's Mother Made

question 20

Essay

In the month preceding this day, the author's mother made 18 phone calls in 30 days. No calls were made on 17 days, 1 call was made on 8 days, and 2 calls were made on 5 days.
Use the Poisson distribution to find the probability of no calls in a day. Based on this probability, how many of the 30 days are expected to have no calls?

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Definitions:

Spermatogenesis

The process of sperm cell production in the testes.

Coitus

The sexual act between a male and female involving insertion of the penis into the vagina, also known as sexual intercourse.

Orchidectomy

A surgical procedure to remove one or both testicles.

Spermatozoon

A mature male gamete or reproductive cell capable of fertilizing an egg in sexual reproduction.