1. The number of degrees of freedom for the appropriate chi-square distribution in a test of independence is:

A. n-1

B. k-1

C. number of rows minus 1 times number of columns minus 1

D. a chi-square distribution is not used

2. In the past, 35% of the students at ABC University were in the Business College, 35% of the students were in the Liberal Arts College, and 30% of the students were in the Education College. To see whether or not the proportions have changed, a sample of 300 students was taken. Ninety of the sample students are in the Business College, 120 are in the Liberal Arts College, and 90 are in the Education College.

The expected frequency for the Business College is:

A. 0.3

B. 0.35

C. 90

D. 105