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A recent survey in Sydney revealed that 75% of customers at Coles spend less than 160 dollars for weekly spending on groceries items. Suppose you

A recent survey in Sydney revealed that 75% of customers at Coles spend less than 160 dollars for weekly spending on groceries items. Suppose you randomly record the spending ofn200 customers at Coles. Calculate 95% confidence interval for the population proportion. Excel code for Critical value = NORM.NV(0.975,0,1)-1.96

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