At the Billy Goat Gruff Inn, Machines Are Set to Dispense

question 24

Essay

At the Billy Goat Gruff Inn, machines are set to dispense 600 ml of soda into everycustomer's glass. Over time, however, the machine can get "out of control" and dispense toomuch soda or too little. The machine needs adjustment if the mean amount dispensed isdifferent than 600 ml. At a randomly selected time each clock hour, the owner dispenses andchecks a glass of soda and determines the actual volume of soda dispensed. One day thevolumes (in ml) of the dispensed soda were:
Is there sufficient evidence to conclude that the dispensing machine needs adjustment?

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Definitions:

Depositary Bank

The first bank to which an item is transferred for collection; the depositary bank may also be the payor bank.

Collection

The process of pursuing payments of debts owed by individuals or businesses, often conducted by creditors or agencies specialized in debt recovery.

Stop Payment Order

A request made to a bank to not process or cancel the payment of a check or transaction previously authorized.

Payor Bank

A bank by which an item is payable as drawn or accepted. It includes a drawee bank.