Homework Question:

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Use the sample information x = 43, = 3, n = 13 to calculate the following confidence intervals for assuming the sample is from a normal population.

(a) 90 percent confidence. (Round your answers to 4 decimal places.)

The 90% confidence interval is from ( ) to ( )

(b) 95 percent confidence. (Round your answers to 4 decimal places.)

The 95% confidence interval is from ( ) to ( )

(c) 99 percent confidence. (Round your answers to 4 decimal places.)

The 99% confidence interval is from ( ) to ( )