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Engineering Data Analysis2D

Estimation - Theory & Concepts - Engineering Data Analysis Sample Size Calculator

Point estimation, confidence intervals for means, proportions, and variances, and prediction/tolerance intervals.

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Engineering Data Analysis • Topic 9

Sample Size Calculator

Estimation Target

Confidence Level

Margin of Error (

E

)0.050

Std Dev (

\sigma

)0.25

Required Sample Sizen = 97

Governing Formula

n = \left(\frac{Z_{\alpha/2} \cdot \sigma}{E}\right)^2

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