# Statistics - Confidence Level

Find the critical value of tc for the confidence level c and the sample size n, noted below, using a two-sided test. C = 0.80 ; n = 22.

Given c = 0.95 ; s = 0.05 ; n = 25 ; x(bar) = 3.5 (i) Find the margin of error. (ii) Construct the confidence interval for μ using the statistics you have calculated above.

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#### Solution Preview

(1) The critical t- score for 80% confidence interval is 1.323 (That is, plus-or-minus 1.323)

(2) ...

#### Solution Summary

A complete, neat and step-by-step solution that determines the critical value is provided.

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