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A recent survey in Sydney revealed that 70% customers at Aldi spend less than 150 dollars...

A recent survey in Sydney revealed that 70% customers at Aldi spend less than 150 dollars for weekly spending on groceries items. Suppose you randomly record the spending of 100 customers at Aldi.

Calculate 95% confidence interval for the population proportion.

Show your workings or provide Excel functions you have used for calculation.

Math   Statistics-And-Probability   
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