Teaching UGC NET Mock Test Series 2025 (Paper 1 & 2) Chemical Sciences Data Analysis Mean and Standard Deviation
In each experiment 5 measurements were made of an observable. The first experiment yielded mean and standard deviation 80 and 4 respectively, whereas the second experiment gave mean and standard deviation 100 and 5 respectively. What is the combined standard deviation of the data?
1
10.97
2
6.52
3
4.83
4
4.53