Question

Express the confidence interval (8.6%,21.4%)(8.6%,21.4%) in the form of ˆp±MEp^±ME.

% ±± %

Answer 1

Solution,

Given that,

The confidence interval (8.6%,21.4%)

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

Point estimate = = (0.086 + 0.214) / 2

Point estimate = = 0.15

Margin of error = E = Upper confidence interval -

Margin of error = E = 0.214 - 0.15

Margin of error = E = 0.064

In the form of   ± ME

15%  ± 6.4%