Question

The intramural competition between two schools had events for 7th and 8th grade students. In the 660-yard run, the times (in minutes) were as follow: 1:53, 1:55, 1:36, 1:46, 2:02, 2:15, 1:49, 2:05, 2:20, 1:42, 1:55 Find the mean. (Hint: convert times to seconds)

Answer 1

To find the mean time for the 660-yard run, times in minutes were first converted to seconds. The sum of all times was 1268 seconds for 11 runners, resulting in a mean time of approximately 115.27 seconds.

Step-by-step explanation:

To find the mean of the 660-yard run times for the intramural competition, first, we need to convert each time from minutes to seconds. After converting, we sum all the times and then divide by the number of times to find the mean.

• 1:53 (113 seconds)
• 1:55 (115 seconds)
• 1:36 (96 seconds)
• 1:46 (106 seconds)
• 2:02 (122 seconds)
• 2:15 (135 seconds)
• 1:49 (109 seconds)
• 2:05 (125 seconds)
• 2:20 (140 seconds)
• 1:42 (102 seconds)
• 1:55 (115 seconds)

Sum of times = 113 + 115 + 96 + 106 + 122 + 135 + 109 + 125 + 140 + 102 + 115 = 1268 seconds

Number of runners = 11

Mean time = Total Sum of times / Number of runners

Mean time = 1268 seconds / 11

Mean time = 115.27 seconds

Therefore, the average (mean) time for the 660-yard run in the intramural competition is approximately 115.27 seconds.