Nk_no1

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các bạn tải miễn phí ebook: What do you think of the opinionpolls?


What do you think of the opinion


polls?


Opinion polls


W hat do you think of the opinion polls?



People often laugh at opinion polls and remember times


when they were slightly incorrect. However, they often


forget all the time when they were accurate. A poll should


be conducted very carefully and should sample a cross-


section of the population. The cross-section should be
selected very carefully so that the right balance of ages,


sexes and social classes can be achieved. At first it was


very difficult for many people to accept that a sample of


one or two thousand could reflect accurately the views of


millions, but polls have now proved themselves. However,


polls should not claim to do what they are not intended to


do. The findings should always be examined very carefully


before predictions are made with any degree of certainty.
Money is the instrument of exchange, helping in buying


and selling and also in fixing a value on things and


commodities. It may be in metal or in paper. With the


market getting more and more complicated, there are


other negotiable instruments which are as good as the


minted coins or the printed notes. Money gives purchasing


power but this power is no



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