Express the confidence interval 30.4 % ± 5.1 % in interval form.
Solution :-
Given :
Point Estimate ( ) Margin of Error ( E )
30.4 % 5.1 %
0.304 0.051
Confidence Interval to be Expressed in interval form is,
- E < u < + E
0.304 - 0.051 < u < 0.304 + 0.051
0.253 < u < 0.355
( 0.253 , 0.355 )
Lower Confidence Interval = 0.253
Upper confidence Interval = 0.355
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