mricher3Lv1

27 Feb 2023

What happens to the width of the interval if the confidence level goes from 95% to 99%?

No, as it does not contain the conference Interval.

 

What would happen to the width of the interval if the sample size was n=9?

As the margin of error decreases when sample size increases. Hence, the confidence interval becomes wider.

 

What would happen to the width of the interval if the sample size was n=100?

If n = 100 then, the 95% confidence interval is given by; = xbar - + tc*(sigma/sqrt(n))

= 12.6 -+ 1.96*(1.96/sqrt(100)) C.I (12.09,13.10). As the margin of error decreases when sample size increases. Hence, the confidence interval becomes narrower.

Please answer in more detail?