A study was recently done in the United States in which car owners were asked to indicate whether their most recent car purchase was a U.S.car,a German car,or a Japanese car.The people in the survey were divided by geographic region in the United States.The following data were recorded.
Given this situation,to test whether the car origin is independent of the geographical location of the buyer,the sum of the expected cell frequencies will equal 1,240.

Question

A study was recently done in the United States in which car owners were asked to indicate whether their most recent car purchase was a U.S.car,a German car,or a Japanese car.The people in the survey were divided by geographic region in the United States.The following data were recorded.
  Given this situation,to test whether the car origin is independent of the geographical location of the buyer,the sum of the expected cell frequencies will equal 1,240.

Quizplus · Accepted Answer

To test for independence in a 3x4 contingency table, the expected cell frequency is computed as (row total x column total) / grand total. The sum of all expected cell frequencies should equal the sample size, not the arbitrary value of 1,240. Therefore, the statement is false.

A Study Was Recently Done in the United States in Which