Give the equation for the standard deviation of a sample

Give the equation for the standard deviation of a sample drawn from a population with a known mean µ.

Give the equation for the standard deviation of a sample drawn from a population with unknown mean.

Can someone help explain the equations and how the unkown/known mean makes a difference?

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Give the equation for the standard deviation of a random : 1 give the equation for the standard deviation of a random variable x over an entire population with probability mass

Give the equation for the standard deviation of a sample : give the equation for the standard deviation of a sample drawn from a population with a known mean micro.give the

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