The temperature (in ) for 15 consecutive days during a Johannesburg winter is given below.

9151194615147282148

3.1.Using the raw data, determine the range.

(2)

3.2.Group the data into a frequency distribution with a lowest class lower limit of 1 and a class width of 3 .

Class

Frequency

Midpoint

Relative Frequency

Cumulative Frequency

5-9

10

7

0.5

10

10-14

2

12

0.1

12

15-19

4

17

0.2

16

20-24

3

22

0.15

19

25-29

1

27

0.05

20

(5)

3.3.Determine the mean using the raw data. (3)

3.4.Draw an upward sloping OGIVE curve corresponding to the data and use it to estimate the median.(10)