Find a general expression of confidence interval for mean, mu, with a confident percentage 80
Answer
We know that the general expression for confidence interval is given as
Now, it is given that the confidence level for the required confidence interval is 80
So, z critical value corresponding to 80 confidence level is 1.28 (using z distribution table)
Setting the z value in the general equation, we get
this is required general expression of confidence interval for mean, mu with a confident percentage 80.
Find a general expression of confidence interval for mean, mu, with a confident percentage 80
Construct the confidence interval for the population mean mu. cequals0.95, x overbar equals 15.2, sigmaequals4.0, and nequals55 A 95% confidence interval for mu is
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