A sport science analyst wants to study the trend of time recorded by men’s 100 meters Olympic Game gold and silver medallists for the past 15 editions. He collected 15 data as shown in Table 2.
Table 2
Year Gold
(seconds) Silver
(seconds)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15 2024
2020
2016
2012
2008
2004
2000
1996
1992
1988
1984
1980
1976
1972
1968 9.79
9.80
9.81
9.63
9.69
9.85
9.87
9.84
9.96
9.92
9.99
10.25
10.06
10.14
9.95 9.79
9.84
9.89
9.75
9.89
9.86
9.99
9.89
9.96
9.99
10.21
10.26
10.08
10.14
10.07
(a) Calculate the mean time recorded for the gold and silver medallists.
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