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InstaTrade, an online stock-trading servies, has over 25,000 clients. To estimate the average number of trades...

InstaTrade, an online stock-trading servies, has over 25,000 clients. To estimate the average number of trades made last month, the trades of a random sample of 250 clients were recorded. The sample average number of trades is 45.8, with a sample standard deviation of 12.3. Show the 95% confidence interval for the population mean number of trades per client.

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