Question: The average customer of the Halifax bank in Britain of
The average customer of the Halifax bank in Britain (of whom there are 7.6 million) received $3,600 when the institution changed from a building society to a bank. If this is based on a random sample of 500 customers with standard deviation = $800, give a 95% confidence interval for the average amount paid to any of the 7.6 million bank customers.
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