Exhibit 12-1 A Grocery Store Manager Would Like to Use an Analytical

question 7

Essay

Exhibit 12-1
A grocery store manager would like to use an analytical queueing model to study the lines of customers that form in front of the checkout stations in the store. During a period of time when business is steady, several store employees have gathered data on customer interarrival times, which are shown below.

-[Part 1] Refer to Exhibit 12-1.Is it reasonable to assume exponentially distributed interarrival times for the grocery store customers
If so,what is λ

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Definitions:

Genotype

The genetic makeup of an organism, consisting of all the DNA and genes present within its genome.

Dosage Compensation

Genetic mechanism by which the expression of X-linked genes is made equivalent in XX females and XY males; in mammals this is accomplished by rendering all but one X chromosome inactive.

X Chromosome Inactivation

A process by which one of the copies of the X chromosome present in female mammals is inactivated, ensuring that males and females have the same dose of the X chromosome genes.

X Chromosome Inactivation Center (XIC)

A critical region on the X chromosome that controls the process of X chromosome inactivation during female development.