A Researcher Hypothesizes That the Variation in the Amount of Money

question 46

Multiple Choice

A researcher hypothesizes that the variation in the amount of money spent on business dinners is greater than the amount spent on lunches. The variance of the cost of nine business dinners (in US\$) was $6.12$ and the variance on 12 lunches was $0.87$ . What test value should be used in an $F$ test?

• A) 9.61
• B) 7.03
• C) 49.5
• D) 2.65

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Definitions:

Average Number

A central value of a numerical set, typically calculated as the sum of the values divided by the count of numbers.

Poisson Distribution

A probability distribution used to model the number of times an event occurs in a fixed interval of time or space, assuming events occur with a known constant mean rate and independently of the time since the last event.

Post Office

A public facility or institution responsible for handling mail services, including the collection, sorting, and delivery of letters and packages.

Probability

The likelihood or chance of an event occurring.