Question

Suppose you want a confidence interval that is wider than the 95% confidence interval that you have constructed, how would you proceed?

Answer 1

Answer-

Interval is given by,

(Point estimate - MOE, Point estimate + MOE).

That is width depends on the margin of error.

To increase width we need to increase margin of error.

Margin of error = z*s.d/√n.

That is margin of error is inversely proportional to the samppe size n and directly proportional to the standard deviation and critical value z for desired confidence level.

So in order to increase the width,

Decrease the sample size or increase the level of confidence.