2.11 Educational attainment of couples:  The table below shows the distribution of education level attained by US residents by gender based on data collected during the 2010 American Community Survey. (please round all answers to four decimal places)

	A	B	C	D	F
(a)	0.3	0.3	0.3	0.2	0.1
(b)	0	0	1	0	0
(c)	0.3	0.3	0.3	0	0
(d)	0.3	0.5	0.2	0.1	-0.1
(e)	0.2	0.4	0.2	0.1	0.1
(f)	0	-0.1	1.1	0	0

a) Distribution (a) is a/an:

b) Distribution (b) is a/an:

c) Distribution (c) is a/an:

d) Distribution (d) is a/an:

e) Distribution (e) is a/an:

f) Distribution (f) is a/an:

g) Explain the reasoning for making your choices above.