The 6:00 a.m. temperatures for four consecutive days in the town of Lincoln were -12.1 C, -7.8 C, -14.3 C, and 7.2 °C. What was the average 6:00 am temperature for the four days?
To calculate the average (mean) value of a set of numbers you have to add all the numbers and divide the sum by the number of measured values.
Here we have:
Answer: The average temperature is