You Choose ALL that are true.

The 80 % confidence interval for Sample 13 is narrower than the 95 % confidence interval for Sample 13. This is coincidence; when constructing a confidence interval for a sample, there is no relationship between the level of confidence and the width of the interval.

From the 95 % confidence interval for Sample 13, we cannot say that there is a 95 % probability that the population mean is between 136.9 and 146.1 .

If there were a Sample 21 of size = n 190 taken from the same population as Sample 13, then the 95 % confidence interval for Sample 21 would be wider than the 95 % confidence interval for Sample 13.

The 80 % confidence interval for Sample 13 does not indicate that 80 % of the Sample 13 data values are between 138.5 and 144.5 .