Question

.

1000m HORSE-RACE

A stopwatch was used to find the time that it took a group of jockey to run 1000 m. race.

Time (in sec.)

0-20

20-40

40-60

60-80

80-100

No. of participants(jockey)

8

10

13

6

3

i. Estimate the mean-time taken by a jockey to finish the race.

a. 54

b. 63

c. 43

d. 50

ii. What wiil 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 lower limits of the median class and modal class is:

a. 60

b. 100

c. 80

d. 140

v. How many participants finished the race within 1 minute?

a. 8

b. 37

c. 31

d. 18​

Answer 1

Step-by-step explanation:

hope it helps you solve this question

Answer 2

Answer:

1- (c)43

2-(c)60

3-(b)median

4-(c)80