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A Supermarket Has Just Added a New Cash Register to Reduce

question 87

Essay

A supermarket has just added a new cash register to reduce the waiting times of the customers during weekends.Since a new cash register is added,the customers expect that their waiting time will be less than the waiting time before the cash register was added.Suppose the sample variance of the waiting times for 25 customers before adding the new cash register is = 4.8 minutes,while the sample variance of the waiting times for 25 customers after adding the cash register is = 2.2 minutes.The manager of the supermarket believes that the waiting times are normally distributed and that the two samples are drawn independently.
A)Develop the hypotheses to test whether the ratio of two population variances is less than 1.
B)Calculate the appropriate test statistic.
C)Using the p-value approach,determine the decision rule at the 5% significance level.
D)What is the conclusion? Given that all other criteria are satisfied,should the supermarket continue with the new cash register?

Recognize the features and significance of broadband and mobile network connections.

Identify various types of networks and their specific applications.

Understand the components necessary for building and maintaining a network.

Recognize network protocols and standards for data exchange.

Definitions:

Withdrawn

Refers to the act of taking back or removing an offer, statement, or accusation before it has been accepted or acted upon.

Changes Mind

Changing mind refers to the act of altering one's decision or opinion about a previously made choice or stance.

Rejecting Delivery

The act of refusing to accept goods or delivery of goods, typically because they do not meet the terms of a contract or order.

Reship Conforming Goods

The act of sending goods that meet the contractual specifications after initially shipping non-conforming goods.