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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?

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https://brainmass.com/statistics/sampling/solving-sample-size-calculation-problem-244702

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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