Please note, I have intentionally left my answers.

I have looked at this and still can not come up with the correct formula and way to solve this by using the t-values chart for selected degrees of freedom.

Use the sample informationxx= 38,= 4,n= 11 to calculate the following confidence intervals forassuming the sample is from a normal population.

1. 90 percent confidence.(Round to 4 decimal places.)

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