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McDonald Corporation wishes to estimate the average annual sales at its various McDonald

Restaurants for the current year, �(y). It takes a random sample of n = 11 and obtains
the following data. Let x be the annual sale for the previous year, and y be the sale of
current year (obtained by doubling the sale of the �rst six months). Assume that N = 1000
and �(x) = 2:43 million dollars.

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