50. Jay recorded the finishing times of 10 randomly selected runners from each
of two races, a 2-kilometer race and a
5-kilometer race. The times, in minutes,
are shown below.
2-Kilometer Race: 9.8. 12.2.10.0,
8.7.9.2, 10.3, 7.8.9.7, 11.4, 10.9
5-Kilometer Race: 210, 26.3.
29.5, 25.2, 24.7, 20.6, 26.9,
22.5, 24.3, 29.0
Based on the interquartile ranges of these
two sets of data, which of the following
is a reasonable conclusion concerning
finishing times in the two races?
is a reasonable conclusion concerning
finishing times in the two races?
A. There was a greater variability of
finishing times for the middle 50%
of the 5-km race runners than for the
middle 50% of the 2-km race runners,
B. There was a greater variability of
finishing times for the middle 50%
of the 2-km race runners than for the
middle 50% of the 5-km race runners.
c. The variability of finishing times for
the middle 50% of the runners was
the same for the 2-km race as for the
5-km race,
D. The average speed, in kilometers
per hour, was faster for runners in
the 2 km race than for runners
in the 5-km race,