Question

*μ* assuming that each sample is from a normal population.**(a)** x⎯⎯x¯ = 24, *σ* = 3, *n* = 13, 90 percentage confidence. **(Round your answers to 2 decimal places.)**

The 90% confidence interval is from _______ to ________ .

**(b) x⎯⎯x¯ **= 120, *σ* = 11, *n* = 26, 99 percentage confidence. **(Round your answers to 2 decimal places.)**

The 99% confidence interval is from _______ to _______ .

**(c)** x⎯⎯x¯ = 12.2, *σ* = 1.3, *n* = 52, 95 percentage confidence. **(Round your answers to 3 decimal places.)**

The 95% confidence interval is from ________ to ________ .

Step 1

(a) The 90% confidence interval is:

Step 2

(b) The 99% confidence inter...

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