CASE STUDY QUESTION 14-Class X-Maths
A stopwatch was used to find the time that it took a group of students to run 100 m.
(a) Estimate the mean time taken by a student to finish the race.
(i) 54 (ii) 63 (iii) 43 (iv) 50
(b) What will be the upper limit of the modal class ?
(i) 20 (ii) 40 (iii) 60 (iv) 80
Sol: (iii) 60
(c) The construction of cumulative frequency table is useful in determining the
(i) Mean (ii) Median
(iii) Mode (iv) All of the above
Sol: (ii) Median
(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