Express the Confidence Interval in the form of xbar +-E
Express the Confidence Interval in the form of xbar +-E
Given Information:
Z interval: (291.67, 543.11)
xbar = 417.39
n=98
Choose correct confidence interval:
a) 417.39 +- 291.67
b) 417.39+-125.72
Why?
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Solution Preview
Please see the attached Word document for solution and explanation.
Solution:
Recall the formula for finding a confidence interval:
You can see that ...
Solution Summary
In this solution, we are given a confidence interval expressed as z-scores and must convert it to the form xbar +-E. Calculation details and explanation provided.
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