Question

8.
A stop watch was used to find the time that it took a group of athlete to
run 1000m race.
Time (in Sec)
0 - 20
20 - 40
40 - 60
60 - 80
80 - 100
No. of participants
8
10
13
6
3
(i) Estimate the mean time taken by an athlete to finish the race
a) 54
b) 63 c) 43
d) 50
What will be the upper limit of the modal class?
a) 20 b) 40 c) 60
d) 80
(iii) The construction of the cumulative frequency table is useful in
determining the
a) Mean b) Median c) Mode d) All of the above
(iv) The sum of the lower limits of the median class and modal class
is
a) 60
b) 100
d) 140
(v) How many participants finished the race within 1 minute?
b) 37
c) 31
d) 18.
c) 80
a) 8​

Answer 1

Step-by-step explanation:

1) 43

2) 60

3) median

4) 60

5) 31

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