# confidence limits

1. ### Dividing means and their SD to give confidence limits

Hi all, I am trying to solve the following elementary stats question, but am not sure how: "10 values were taken to calculate the mean of 'A', and 10 separate values were taken to calculate the mean of 'B': mean A = 73.5 (standard deviation 6.3) mean B = 12.7 (standard deviation 2.7)...
2. ### Lower/Upper confidence limits for 5/9 point rating scales

If you have a rating scale such as are used on product websites where users enter scores 1,2,3,4,5 (five values) and averages are (presumably) rounded to discrete intervals 1,1.5,2,2.5,3,3.5,4,4.5,5 (nine values), what is the best method for calculating lower and upper confidence limits around a...
3. ### Confidence limits on occupant satisfaction in buildings

Apologies to all if this is a chestnut of a question, but I've just joined TalkStats. Question: what is an appropriate confidence limit to apply to mean difference analysis for human perception data? Movements in perceptions over time can be small, but significant from a human perception...