exercises problem solving, Basic Statistics

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a manufacturer claims that 60% of beer drinkers perfer his beer. A query with 30 beer drinkers selected at random showed that 16 of them prefer this brand.(a.)Does the evidence support the manufacturer''s claim of 5% level of significance? (b).If an extra set of 70 drinkers were asked & of these 70,54 are found to prefer the brand, would the combined evidence for the 100 beer drinkers lead us to doubt the manufacturer''s claim?

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