Mathematics, 15.02.2021 21:00, castroarlety

A group of 50000 loan requests made through the web site of a bank report an average income of $37000 with a standard deviation of $20000. Furthermore, 20% of the requests report a gross income over $50000. A group of 900 requests is chosen at random to check their accuracy. Find the expected value and standard deviation of the total income of the 900 loan requests.

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A group of 50000 loan requests made through the web site of a bank report an average income of $3700...