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Sample Size Calculator Assignment Help
Calculate estimated sample size for confidence level, margin of error, and population proportion in statistics coursework.
Estimated sample size: 385
Formula context
Understand the inputs before using the output
This calculator estimates a sample size for a population proportion using confidence level, margin of error, and expected proportion.
At 95% confidence, 5% margin of error, and 50% expected proportion, the large-population estimate is about 385. A smaller finite population may require an additional correction if the assignment specifies one.
Use the confidence level required by the studyEnter margin of error as a percentageUse a defensible expected proportion or 50% when instructedCheck whether finite-population correction is required
Interpretation
Checks that belong in the written answer
A correct calculation can still be incomplete if the assumptions or meaning are not stated.
Questions and answers
Sample Size Calculator FAQs
Answers are kept specific to this page so students can check requirements, method, files, and limitations without reading repeated site-wide text.
What does the sample-size calculator assume?
It uses a proportion-based sample-size formula and is most useful when the confidence level, margin of error, and expected proportion match the study design.
Why is 50% often used for the proportion?
When the expected proportion is unknown, 50% produces the largest variance and therefore a conservative sample-size estimate for this formula.
Does this calculator include finite-population correction?
The current tool gives the standard large-population estimate. If the population is small, the course may require a finite-population adjustment.
Can I use the calculator result by itself in coursework?
Use it only as the assignment permits. Many courses also require the formula, working, units, assumptions, or written interpretation.
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