Table:
0
A
B
C
D
E
F
1
Index (Year)
Author / Editor / Source
Year of publication
Countries sampled
World Ranking (1)
Ranking L.A. (2)
2
Environmental Performance (2008)
Yale University
2008
149
32nd
5th
3
Democracy (2010)
The Economist
2010
167
46th
4th
4
Global Peace (2008)
The Economist
2008
140
48th
4th
5
Economic Freedom (2008)
The Wall Street Journal
2008
157
46th
3rd
6
Quality-of-life (2005)
The Economist
2007
111
47th
7th
7
Travel and Tourism Competitiveness (2008)
World Economic Forum
2008
130
50th
3rd
8
Press Freedom (2007)
Reporters Without Borders
2007
169
54th
5th
9
Global Competitiviness (2007)
World Economic Forum
2007–08
131
59th
3rd
10
Human Development (2005)
United Nations (UNDP)
2007–08
177
62nd
7th
11
Corruption Perception (2010)
Transparency International
2010
178
73rd
6th

Questions and formulas:
Question: what's the author / editor / source with index (year) being press freedom (2007)
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:F1,A1="Press Freedom (2007)"),2))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:F11,A2:A11="Press Freedom (2007)"),2))
Level: medium
Question:  how many countries sampled with year of publication being 2007 and ranking l.a. (2) being 7th
Formula: SUM(FILTER(D1, (C1=2007)*(F1="7th")))
Formula2: SUM(FILTER(D2:D11, (C2:C11=2007)*(F2:F11="7th")))
Level: easy
Question: what's the author / editor / source with world ranking (1) being 73rd
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:F1,E1="73rd"),2))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:F11,E2:E11="73rd"),2))
Level: medium