Everything Maths Grade 10

8.A group of learners count the number of stones they each have. This is a histogram describing the data

they collected:

1

2

3

4

0-3 4-7 8-11 12-1516-20

number of stones

y

A cleaner knocks over their table, and all their notes land on the floor, mixed up, by accident!

Help them find which of the following data sets match the above histogram:

Data Set A

12 4 2 15 10 18 10 16 16 19

1 2 9 10 16 10 11 9 2 13

Data Set B

7 10 4 5 8 7 12 10

14 5 1 9 2 13 3

Data Set C

9 3 8 5 8

5 8 1 4 3

9.A class experiment was conducted and 50 learners were asked to guess the number of sweets in a jar.

The following guesses were recorded:

56 49 40 11 33 33 37 29 30 59

21 16 38 44 38 52 22 24 30 34

42 15 48 33 51 44 33 17 19 44

47 23 27 47 13 25 53 57 28 23

36 35 40 23 45 39 32 58 22 40

a)Draw up a grouped frequency table using the intervals 10 < x 20 , 20 < x 30 , 30 < x 40 ,

40 < x 50 and 50 < x 60.

b)Draw the histogram corresponding to the frequency table of the grouped data.

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Chapter 10. Statistics 369