Table:
0
A
B
C
D
E
1
Poll Source
Dates administered
Democrat: Mark Begich
Republican: Ted Stevens
Lead Maragin
2
Rasmussen Reports
October 28, 2008
52%
44%
8
3
Rasmussen Reports
October 6, 2008
48%
49%
1
4
Ivan Moore Research
September 20–22, 2008
48%
46%
2
5
Daily Kos/Research 2000
September 15-September 17, 2008
50%
44%
6
6
Rasmussen Reports
September 9, 2008
48%
46%
2
7
Moore Information *
September 2–3, 2008
46%
44%
2
8
Ivan Moore Research
August 30 - September 2, 2008
49%
46%
3
9
Ivan Moore Research
August 9–12, 2008
56%
39%
17
10
Ivan Moore Research
July 30–31, 2008
56%
35%
21
11
Rasmussen Reports
July 30, 2008
50%
37%
13
12
Ivan Moore Research
July 18–22, 2008
51%
43%
8
13
Rasmussen Reports
July 17, 2008
52%
44%
8
14
Research 2000/Daily Kos
July 14–16, 2008
47%
45%
2
15
Rasmussen Reports
June 16, 2008
44%
46%
2
16
Rasmussen Reports
May 14, 2008
47%
45%
2
17
Research 2000
May 12–14, 2008
48%
43%
5
18
Hellenthal & Associates, DSCC *
May 6–10, 2008
51%
44%
7
19
Rasmussen Reports
April 7, 2008
45%
46%
1
20
Research 2000
December 3–6, 2007
47%
41%
6

Questions and formulas:
Question: What was the average lead maragin for the dates administered of october 6, 2008?
Formula: AVERAGEIFS(E1,B1,"october 6, 2008")
Formula2: AVERAGEIFS(E2:E20,B2:B20,"october 6, 2008")
Level: easy
Question: What was the poll source for october 6, 2008?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,B1="october 6, 2008"),1))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E20,B2:B20="october 6, 2008"),1))
Level: medium