Assume that sample mean x overbar and sample standard deviation s remain exactly the same as those you just calculated but that are based on a sample of nequals25 observations. repeat part a. what is the effect of increasing the sample size on the width of the confidence intervals?

As we increase the number of observations the width of the confidence interval decreases.

Step-by-step explanation:

The general formula for the confidence interval for the mean is:

And we know that the variance of is:

As it was informed the mean and the standard deviation remains the same during the process, so the second term depends only on the number of observations, and the relationship is inverse. So if we increase the n the second term becomes smaller, and so the width of the interval decreases.