A study revealed the following data on methods Canadians use

A study revealed the following data on methods Canadians use to get to work, by residence.

1) Which of the following statements is true?

A. Mode of transportation and residence are dependent, but they would be independent if we changed the second row of counts from 650, 50, 700 to 475, 225, 700.
B. Mode of transportation and residence are dependent, but they would be independent if we changed the second row of counts from 650, 50, 700 to 550, 150, 700.
C. Mode of transportation and residence are dependent, but they would be independent if we changed the second row of counts from 650, 50, 700 to 525, 175, 700.
D. Mode of transportation and residence are dependent, but they would be independent if we changed the second row of counts from 650, 50, 700 to 450, 250, 700.
E. Mode of transportation and residence are dependent, but they would be independent if we changed the second row of counts from 650, 50, 700 to 650, 650, 1300.
F. Mode of transportation and residence are independent.

2) To encourage people to take public transit, the government runs a program which provides free transit passes for a month. The 600 residents who drive to work are invited to participate in the following experiment. Half of the urban residents who drive to work are randomized to receive the free pass for one month and half do not receive such free pass. The rural residents who drive to work are randomized in a similar fashion. After six months, the proportion of urban residents who switch to taking public transit is compared between the free-pass and no-free pass groups. The same comparison is also done among the rural residents.

In the experiment described above, area of residence (urban versus rural) [CHECK ALL THAT APPLY]
A. defines the experimental units.
B. is the response variable.
C. is the blocking variable.
D. defines the treatments.
E. none of the above.

Solution

In the expriment describes above are of residence define the exprimental units.

Therefore, the correct option is A