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Fehlermargen-Rechner

Fehlermarge Schritt für Schritt berechnen

Der Rechner ermittelt die Fehlerspanne anhand des gegebenen Stichprobenumfangs und der Verteilung, wobei die einzelnen Schritte angezeigt werden.

Sample size:

Confidence level: %

standard deviation:

Distribution used:
If the population standard deviation is known or the sample size is , normal distribution will be chosen automatically. To force another distribution, choose it explicitly.

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Solution

Your input: find the margin of error for the sample size n=64, standard deviation σ=7, and confidence level 95.0% using normal distribution.

First, find the critical value: zα2=1.95996398454005

Next, find the standard error of the mean: SE=σn=78

Finally, the margin of error is ME=zα2SE=1.95996398454005(78)1.71496848647255

Answer: ME=1.71496848647255