# Thread: Stats-How do you determine if an interval is usable?

1. ## Stats-How do you determine if an interval is usable?

I was given data (not sure if I need it for you to help) and determined it was normal.
I was asked to calculate a 95% confidence interval which I found to be b/w 142.06 and 150.98. Then I am asked if this inteval is usuable. How do I know if it is or isn't?
Also, the point estimate is 146.5161

2. Originally Posted by beetz
I was given data (not sure if I need it for you to help) and determined it was normal.
I was asked to calculate a 95% confidence interval which I found to be b/w 142.06 and 150.98. Then I am asked if this inteval is usuable. How do I know if it is or isn't?
Also, the point estimate is 146.5161
The problem here is that the concept of usability is almost certainly related
to the wider question, and not what you have told us.

That is usability is not a statistical concept but belongs to the problem
domain and if you don't tell us anything more we cannot answer your
question.

RonL