Recent content by ldlafountain

So I double checked my calculation on standard deviation and I got 0.0116. So to plug it all in, I should be able to use: .0004(plus/minus) 1.677 * (0.0116/sqrt{50}) I got the 50 from my sample size and I got the 1.677 from a t-value chart. After plugging this in, I do not get the answer I a...

Honestly, I plugged all of the numbers into a standard deviation calculator online. I actually used the one from mathisfun.com. I got the mean the same way. But what could the standard deviation be. I understand how it is calculated, but I am still having issues.

I am working on a problem for my Statistics class and I am looking for some clarification and some direction. The questions asks about a study that has been done on the diameter of 50 screws (both digital and vernier scale calipers). The differences in the measured diameters had the following...