There are differences among ethnic, religious, and regional groups, even among __________ Americans

The Articles of Confederation failed mainly because

a. They lacked legitimacy. b. They provided inadequate sovereignty. c. They failed to provide adequate political goods. d. They failed to settle the problem of slavery between the North and the South.

_________________________ typically results from the use of a biased measurement instrument.

a. Random error b. Ecological error c. Distribution error d. Systematic error