When constructing a confidence interval, increasing the sample size (n) will _____ the interval.

	a.	Narrow
	b.	Shorten
	c.	Widen
	d.	Shrink

General practice says that we should use a significance value (a) of ___ when conducting hypothesis tests.

	a.	50%
	b.	5%
	c.	1%
	d.	10%

Which of the following is an example of a non-directional hypothesis?

	a.	= 100
	b.	100
	c.	> 100
	d.	< 100