Question

Construct the confidence interval for the population mean mu. cequals0.95, x overbar equals 4.8, sigmaequals0.4, and nequals57 A 95% confidence interval for mu is left parenthesis nothing comma nothing right parenthesis . (Round to two decimal places as needed.)

Answer #1

95% confidence interval for is

- Z * / sqrt(n) < < + Z * / sqrt(n)

4.8 - 1.96 * 0.4 / sqrt(57) < < 4.8 + 1.96 * 0.4 / sqrt(57)

4.70 < < 4.90

95% CI is **( 4.70 , 4.90 )**

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