Estimate the Population Mean from Raw Data

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Use this estimate if you have a sample of numeric data for which you want an estimate of and confidence interval for the mean.

1.	Create a new estimate by dragging one from the shelf or choosing Object \| New \| Interval Estimate.

2.	From the pop-up menu in the estimate’s upper-right corner, choose Estimate Mean.

3.	Drop the attribute of interest into the prompt in the top section of the estimate, where it says Attribute (numeric): <unassigned>.

Fathom uses the attribute’s name and values to fill in the estimate at the default confidence level of 95%.

•Change the confidence level by double-clicking the 95, typing a new value, and pressing Return.