Introduction to Errors and Statistics in Analytical Chemistry (Part 2)
Exercise problems:
0:00 - 1. The results of an analysis are 36.97 grams, compared with the accepted value of 37.06 grams. What is the relative error in parts per thousand?
2:19 - 2. Calculate the mean and the standard deviation for the set of measured values: 15.67, 15.69, 16.03
6:52 - 3. Which in the following sets of data is more precise:
Set A: 821, 783, 834, 855
Set B: 790, 810, 838, 855 ?
8:40 - 4. The carbohydrate content of a glycoprotein is determined to be 12.6, 11.9, 13.9, 12.7, and 12.5 of carbohydrate per 100g of protein. Find the confidence interval of the carbohydrate content from this analysis.