Question

Express the confidence interval 0.666<p<0.888 in the form DIE +E=0+0

Answer 1

Solution :

confidence interval = 0.666 < p <0.888

Point estimate = $\hat p$ = (Lower confidence interval + Upper confidence interval ) / 2

Point estimate = $\hat p$ = (0.666 + 0.888) / 2

Point estimate = $\hat p$ = 0.777

Margin of error = E = Upper confidence interval - $\hat p$

Margin of error = E = 0.888 - 0.777

Margin of error = E = 0.111

in the form  $\hat p$ ± E   

= 0.777  ± 0.111