Question

Express the confidence interval (11.2%,29.2%)in the form of ˆp±ME

___% ± ____%

Answer 1

Solution :

confidence interval (11.2%,29.2% )

confidence interval ( 0.112, 0.292)

Point estimate = = (Lower confidence interval + Upper confidence interval ) / 2

Point estimate = = (0.112 + 0.292) / 2

Point estimate = = 0.202

Point estimate = = 20.2%

Margin of error = E = Upper confidence interval -

Margin of error = E = 0.292 - 0.202

Margin of error = E = 0.090

Margin of error = E = 9%

Express the confidence interval in the form of ± ME

20.2% ± 9%