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Sample size calculation

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How does the bell-shaped curve for the sampling distribution of sample means for samples of size n = 120 compare to the bell-shaped curve for the sampling distribution of sample means for samples of size n = 95?

Answer: A curve with a sample size of 120 will fit a perfect curve more accurately than a curve with a sample size of 95. As the sample size is increased, the distribution becomes more precise.

BUT QUESTION--What happens to the variability in larger samples that creates that constriction in the bell?

Solution Summary

The solution provides step by step method for the calculation of sample size for normal distribution . Formula for the calculation and Interpretations of the results are also included.

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