Question

(d) 10cm
(0 sm
18. Case Study Based-2
A 110 m hurdle race is organised
for a group of 150 athletes.
The time, in seconds, taken by
the athletes to run the race are
tabulate below:
Time (in sec) 13.8 -
14.8 -
14.0- 14.2- 14.4 14.6-
14.0 14.2
15.0
14.4 14.6 14.8
No. of athletes 2
4
5
71 48 20
(1) What is the class mark of class interval
corresponding to frequency 48?
(a) 14.5
(b) 14.7
(C) 14.75
(d) 14.65
(ii) What will be the upper limit of the median
class?
(a) 14.4 (b) 14.2 (C) 14.8 (d) 14.6
(iii) Estimate the median time taken by an athlete
to finish the race.
(a) 14.76 sec
(b) 14.58 sec
(c) 14.42 sec
(d) 14.6 sec
(iv) The mean time taken by an athlete is 14.6 sec,
then the mode of the given data is:
(a) 14.54 sec
(b) 14.64 sec
(c) 14.94 sec
(d) 14.44 sec
(V) How many athletes finished the hurdle race in
less than 14.6 seconds?
(a) 71
(b) 76
(C) 82
(d) 91​

Answer 1

Answer:

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