If Arrivals Occur According to the Poisson Distribution Every 20 $\lambda$

question 19

Multiple Choice

If arrivals occur according to the Poisson distribution every 20 minutes, then which is NOT true?

• A)\(\lambda\)= 20 arrivals per hour
• B)\(\lambda\) = 3 arrivals per hour
• C)\(\lambda\) = 1/20 arrivals per minute
• D)\(\lambda\) = 72 arrivals per day

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Definitions:

Standard Error

A measure of the statistical accuracy of an estimate, indicating how much the sample mean is expected to vary from the true population mean.

Mean

The average of a set of numbers, calculated by dividing the sum of all values by the count of values, and used as a measure of central tendency.

Z-statistic

A type of standard score that represents the distance in standard deviations a data point is from the mean, used in significance testing.

Two-tailed Test

A statistical test that considers both directions of a possible effect, testing for the possibility of an effect in two opposite directions.