Measuring Usability: Quantitative Usability, Statistics and Six-Sigma

Questions

The following questions have the tag t-distribution associated with them. The number of users that have also tagged the question ' t-distribution ' is in parenthesis.

Find a confidence interval for the mean assuming that each sample is from a normal population. Mean . . . ( 3 )

How would I figure out a 90% and 95% confidence interval for the below informaion? What would be th. . . ( 4 )

If I have a set of values(direct measurements of dynamic deformations of a road at 100m) between 3 a. . . ( 3 )

A random sample of 25 households finds that an average of 2.3 people reside in each house (the stand. . . ( 4 )

Will the t statistics calculated from 4 observations valid?. . . ( 3 )

What constitutes a small sample size in a test of two populations? . . . ( 3 )