Students asked to measure the temperature of a reaction beaker recorded the following temperatures. 103.7°c, 108.4°c, 105.8°c, 104.6°c the actual temperature is 105.1°c. which measurement is the most precise? 103.7°c 108.4°c 105.8°c 104.6°c

There are two terms

a) accuracy : it relates to the exactness of an answer that how an answer is close to the actual answer or actual reading

So 104.6 is accurate

b) Precision : This is related to the closeness of different readings with each other

The first reading is 103.7 and the second one is 108.4  so the second reading is quite different from the first reading so it cannot be called as precised

Again 105.8 has good difference from the second reading hence again this is not precised

However the last reading 104.6 is quite near to 105.8 so 104.6 can be called as precise