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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?
Tune Up
A process of making minor adjustments or modifications to improve the function or performance of a machine, system, or instrument.
Significance Level
The chance of falsely discrediting the null hypothesis in a statistical examination, usually symbolized by alpha.
Car Dealer
A commercial organization that retails brand-new or pre-owned vehicles, operating under a dealership agreement with a car manufacturer or its sales division.
Interval Estimate
A range of values used to estimate a population parameter, typically expressed through confidence intervals.
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