Asked by Fakaapo. Suetusi

If the confidence interval obtained is to wide. How can the width of this interval be reduce and which alternative is the best and why?

Thank you for your help
Answered by PsyDAG
The only thing I can think of is increasing the size of the sample.
Answered by Anonymous
You could also think about changing the type 2 error.
Answered by Anonymous
Sorry, I meant to write type 1 error (or alpha level).
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