If the standard deviation of a population is 214 and your


Please help me with the formula and values for the following:

If the standard deviation of a population is 2.14 and your sample mean is 6, and you know that 15.1% of the population would be below your sample, what is the population mean?

The answer is 8.21 but I need help setting the problem up (by hand).

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Basic Statistics: If the standard deviation of a population is 214 and your
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