Express the Confidence Interval in the form of xbar +-E
Z interval: (291.67, 543.11)
xbar = 417.39
Choose correct confidence interval:
a) 417.39 +- 291.67
Why?© BrainMass Inc. brainmass.com March 4, 2021, 6:08 pm ad1c9bdddf
Please see the attached Word document for solution and explanation.
Recall the formula for finding a confidence interval:
You can see that ...
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.