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**ekbio** 8) July is national Grilling Month in the united states . On July 1,2008 The Harris poll # 70 reported on a survey of American’s grilling preferences .When asked about their favourite food prepared on a barbeque ,662 of 1250 randomly sampled democrats preferred steak. As compared to 586 of 930 randomly sampled republicans.

a)a)give a point estimate for the proportion of all democrats who prefer steak as their favourite barbeque food .

b)Give a point estimate for the population of all republicans who prefer steak as their favourite barbeque food .

c)Give a point estimate for the difference between the proportions of all democrats and all republicans who prefer steak as their favourite barbeque food.

d)Construct a 95 % confidence interval for the difference between the proportions of all democrats and all republicans who prefer steak as their favourite barbeque food

e)Give a practical interpretation of the interval part d .

f)Explain the meaning of the phrase 95% confident in your answer to part e.