The size and effect of the independent variable on the dependent variable is estimated by the __________________ coefficient.

The discovery and the exploitation of the ______ oil shale in North Dakota has provided a major new source of oil for the United States.

Fill in the blank(s) with the appropriate word(s).

Today, some public employees have to take a civil service exam to show that they are qualified for the position, a process that was established by Progressives over 100 years ago.

Answer the following statement true (T) or false (F)