Question

Express the confidence interval ( 0.076, 0.122) in the form p with caret minus Upper E less than p less than p with caret plus Upper E p-E<P<p+E

Answer 1

Solution :

Given that,

Lower confidence interval = 0.076

Upper confidence interval = 0.122

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

= (0.076 + 0.122) / 2

= 0.099

= 0.099

Margin of error = E = Upper confidence interval - = 0.122 - 0.099 = 0.023

In the form of :

- E < p < + E is,

0.099 - 0.023 < p <0.099 + 0.023