Given: Time records for 8 athletes who ran 100 m sprint is 10.2, 10.8, 10.9, 10.3, 10.2, 10.4, 10.1, and 10.4 (in seconds).
Required: To determine the mean time.
Explanation: The mean of n number of observations is the ratio of the sum of all the observations to the number of observations.
Thus,
Further solving-
Final Answer: The mean time is 10.4125 seconds.