1. The problem statement, all variables and given/known data We measure the temperature with a thermometer and we get these results: 3.3 +- 0.1 ºC 3.5 +- 0.1 ºC 3.6 +- 0.1 ºC What is the temperature? 2. Relevant equations Average = Sum of values/amount of measurementes 3. The attempt at a solution Well, I calculate the average and I get 3.4666666666 period. The sensibility of the thermometer is 0.1 ºC so I can't give more than 1 decimal number so I guess the solution is: 3.4 +- 0.1 ºC ( I just rounded the number 3.4666 to the first decimal place) Is this correct?