المساعد الشخصي الرقمي

مشاهدة النسخة كاملة : The challenges of election polling


BECKHAM
28-03-2015, 01:47 PM
The BBC's David Cowling looks at the challenges facing pollsters during the 2015 general election.

for more ... (http://www.bbc.co.uk/news/election-2015-32066177#sa-ns_mchannel=rss&ns_source=PublicRSS20-sa)