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Q: When the size of a representative sample increases does the mean range median or standard deviation decrease?

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The standard deviation would generally decrease because the large the sample size is, the more we know about the population, so we can be more exact in our measurements.

The standard deviation is used in the numerator of the margin of error calculation. As the standard deviation increases, the margin of error increases; therefore the confidence interval width increases. So, the confidence interval gets wider.

The mean is "pushed" in the direction of the outlier. The standard deviation increases.

No.

It depends on the standard deviation and risk of the new stock.

The absolute value of the standard score becomes smaller.

No, it is not.

it should decrease

The variance and the standard deviation will decrease.

The standard deviation is the standard deviation! Its calculation requires no assumption.

The standard deviation of the population. the standard deviation of the population.

The standard deviation is 0.

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