The value of a physical variable was found to be 196, 198, 194, 199, and 198 in a set of five independent measurements. The average value and the standard deviation of these measurements would be closest, respectively, to:

The limiting errors in the measurement of the power consumed by a resistor and the current flowing through it are ±3% and ±1%, respectively. What is the limiting error in the measurement of the resistance?

Which type of experimental error cannot be completely eliminated but can be significantly minimized by taking a large number of repeated measurements?