StatisticsdrillPoisson: at most k
A statistics problem from Statisticsdrill. Solve it with one answer box, with a fresh sample on every attempt and the worked steps and spreadsheet function in the answer, and it is checked the moment you submit.
The task
A clinic sees an average of 2 urgent walk-ins per evening, following a Poisson distribution. It can handle 1 without calling in extra staff. What is the probability that there are at most 1 walk-ins tonight? Round to 4 decimal places.
What this problem teaches
At most k = P(0) + P(1) + ... + P(k).
A hint if you get stuck
At most k = P(0) + P(1) + ... + P(k).
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