AutoTrader

question 71

Multiple Choice

AutoTrader.com would like to test if a difference exists in the age of three different types of vehicles currently on the road: trucks, cars, and vans. The following data represent the age of a random sample of trucks, cars, and vans. The grand mean for these observations is ________.

• A) 7.2
• B) 8.0
• C) 8.9
• D) 9.3

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Definitions:

Electoral College

A body of electors established by the United States Constitution, charged with the responsibility of electing the president and vice president based on the popular vote in each state.

Constitution

The fundamental principles or established precedents according to which a state or other organization is governed.

Electoral College Votes

The process in the United States by which electors from each state cast votes to determine the President and Vice-President.

House of Representatives

The lower chamber of the United States Congress, composed of elected officials who represent individual districts in their states.