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January 31, 2015

January 31, 2015

Posted by **Panther** on Sunday, April 14, 2013 at 9:41pm.

graduates who majored in biology. How many such incomes must be found if the

economist wants to be 95% confident that the sample mean is within $500 of the true

population mean? Assume that research has found that the population standard

deviation for such incomes is equal to $6,250.

- statistics -
**PsyDAG**, Monday, April 15, 2013 at 12:27pm95% = mean ± 1.96 SEm

1.96 SEm = $500

SEm = SD/√n

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