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Confidence Interval Information

What information does a confidence interval give?

A sample of 50 employees was taken and the average number of children in each of the employee's family was computed to be 2.1 with a standard deviation of 0.5.

Compute the 95% confidence interval on the average number of children. Interpret the answer .

Solution Preview

Here n = 50, Mean x ̅ = 2.1, Standard Deviation σ = 0.50
 = 0.05, so ...

Solution Summary

The solution examines confidence interval information. A 95% confidence interval on average is used.