(a) Estimate the mean time taken by a student to finish the race. (i) 54 (ii) 63 (iii) 43 (iv) 50

Question

100m 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

(a) Estimate the mean time taken by a student to finish the race. 

(i) 54 

(ii) 63 

(iii) 43 

(iv) 50

(b) What wiil be the upper limit of the modal class ? 

(i) 20 

(ii) 40 

(iii) 60 

(iv) 80

(c) The construction of cummulative frequency table is useful in determining the 

(i) Mean 

(ii) Median 

(iii) Mode 

(iv) All of the above

(d) The sum of lower limits of median class and modal class is 

(i) 60 

(ii) 100 

(iii) 80 

(iv) 140

(e) How many students finished the race within 1 minute? 

(i) 18 

(ii) 37 

(iii) 31 

(iv) 8 

Answer 1

(a) iii) 43 

(b) iii) 60 

(c) ii) Median

(d) iii) 80 

(e) iii) 31