In the Past, the Average Waiting Time Per Customer at a Fast

question 24

Multiple Choice

In the past, the average waiting time per customer at a fast food restaurant has been 7.5 minutes. The customer waiting time has a normal distribution. The manager claims that the use of a new cashier system will decrease the average customer waiting time in the store. A random sample of 16 customer transactions produces a mean waiting time of 6.3 minutes and a standard deviation of 2 minutes.

-What is the value of the appropriate test statistic?

• A)t = -1.2
• B)t = 2.4
• C)t = -2.4
• D)t = -0.6
• E)t = 9.6

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Definitions:

Mercury

A chemical element with the symbol Hg and atomic number 80, known as quicksilver; a heavy, silvery d-block element that is liquid at room temperature.

Helium

A colorless, odorless, tasteless, inert gas that is the second lightest element and found in abundance in the universe.

Coinage Metals

Coinage metals refer to metals that historically have been used to make coins, primarily including gold, silver, and copper due to their corrosion resistance and ease of workability.

Copper

A ductile, malleable, reddish-brown metallic element with good electrical and thermal conductivity, used in electrical wiring and coinage.