Smaller confidence intervals are better as they give us a more precise estimate of the mean. A simple way to affect the width of the interval is to change the confidence level. Watch here to see how.
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Question 1 of 2
1. Question
If the the value of 1-α is reduced, the confidence interval:
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Question 2 of 2
2. Question
How does the width of a confidence interval change as the confidence level increases?