Finding the sample size to estimate a mean to a given margin of error
Here, we want to obtain the sample size required to estimate a population parameter to a given margin of error. We will not use specific values but will find the number of samples required to estimate a mean with a confidence interval ±0.5 and ±1 standard deviation wide.
How to do it…
The following steps will identify the number of samples required to find an estimate of the population mean to a confidence interval of +/- 0.5 and +/-1 standard deviations wide:
- Go to the Stat menu, go to Power and Sample Size, and select Sample Size for Estimation….
- In the Parameter section, select Mean (Normal) from the dropdown.
- Under Planning Value, enter Standard deviation: as
1. - In Margins of ...
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