(1) X~N(50,5). P(X > 56) = __________ .

	80.2%
	88.5%
	11.5%
	2%

Using histograms for visual comparison of distributions of different data sets requires:

Question 3 options:

	The same bin ranges
	Different sample sizes
	Different y axis values
	The same bin ranges & different sample sizes

X~N(100,2). P(X<97) = _________.

Question 8 options:

	6.7%
	93.3%
	4%
	5.5%

X~N(10,2). The value of x that represents the top 20% (80% to the left) is

Question 9 options:

	11.68
	8.32
	12.51
	9.56