Confidence intervals and English-language tests for international students (continued): Using the IELTS listening data presented in the previous exercise, practice evaluating data using confidence intervals.
A. Compute the 80% confidence interval.
B. How do the conclusion and the confidence interval change as we move from 95% confidence to 80% confidence
C. Why don't we talk about having 100% confidence? What would the confidence interval look like?

Question

Confidence intervals and English-language tests for international students (continued): Using the IELTS listening data presented in the previous exercise, practice evaluating data using confidence intervals.
A. Compute the 80% confidence interval.
B. How do the conclusion and the confidence interval change as we move from 95%  confidence to 80% confidence 
C. Why don't we talk about having 100% confidence? What would the confidence interval look like?

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