Statistics Case Study Based Questions 03 Term II -

Mathematics TERM II

100 m Race:
A stopwatch was used to find the time that it took a group of students to run 100 m.

Time (in sec.)	0-20	20-40	40-60	60-80	80-100
No. of students	8	10	13	6	3

1. The estimated mean time taken by a student to finish the race is

(a) 54
(b) 63
(c) 43
(d) 50

Answer

2. What will be the upper limit of the modal class?

(a) 20
(b) 40
(c) 60
(d) 80

Answer

3. The construction of cumulative frequency table is useful in determining the

(a) mean
(b) median
(c) mode
(d) All of the above

Answer

(b) median

4. The sum of lower limits of median class and modal class is

(a) 60
(b) 100
(c) 80
(d) 140

Answer

5. How many students finished the race within 1 minute?

(a) 18
(b) 37
(c) 31
(d) 8

Answer