negative Confidence interval. What is the interpretaion when both high and low confidence interval

Hi Akua,

Confidence interval interpretation depends on the variable it measures. Consider the exercise file in this lesson. We have drawn a sample of people who have undertaken the 12-week exercise program to lose weight. When you calculate the confidence interval, with a 95% confidence level, you can make an inference based on that sample about how many pounds or kilograms a particular subject outside of this sample is expected to lose if he or she sticks strictly to this exercise program. The 95% confidence interval in this example will be [-11.31, -6.86] in kilograms. This will be interpreted as follows: we are 95% confident that anyone in the population who sticks strictly to our exercise program will lose between 11.31 and 6.86 kilograms.

I hope it makes sense now.

Kind regards,
Kyrillos