An Alarm Company Reports That the Number of Alarms Sent $\lambda = 4.7$

question 19

Multiple Choice

An alarm company reports that the number of alarms sent to their monitoring center from customers owning their system follow a Poisson distribution with $\lambda = 4.7$ alarms per year. Identify the mean and standard deviation for this distribution.

• A) mean \(= 4.7\), standard Deviation \(= 4.7\)
• B) mean \(= 2.17\), standard Deviation \(= 2.17\)
• C) mean \(= 4.7\), standard Deviation \(= 2.17\)
• D) mean \(= 2.17\), standard Deviation \(= 4.7\)

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Definitions:

Standard Deviations

A measure of the amount of variation or dispersion of a set of values, indicating how much individual data points differ from the mean.

Normal Curve

A bell-shaped curve showing the usual frequency distribution of values of measured human traits and other natural phenomena.

Test-retest Reliability

A measure of consistency in the results of a test administered to the same individuals at two different points in time.

Normal Curve

A symmetrical, bell-shaped curve that describes the distribution of many types of data where most of the data points are close to the mean.