Final answer:
The mean of the five measurements 18mm, 24mm, 18mm, 20mm, and 22mm is 20.4mm, calculated by summing all measurements and dividing by the number of measurements.
Step-by-step explanation:
To calculate the mean of the five measurements (18mm, 24mm, 18mm, 20mm, and 22mm), you add all of the measurements together and then divide by the number of measurements. So, the calculation would be:
(18 + 24 + 18 + 20 + 22) / 5 = 102 / 5 = 20.4mm
The mean of these measurements, using the empirical method, is 20.4mm. It is essential to report the mean with the same number of decimal places as the original data.