1. The pay roll of a company is presented below:

Monthly earnings (N$) Number of employees

46 - 50 2

51 - 55 2

56 - 60 5

61 - 65 6

66 - 70 7

71 - 75 11

76 - 80 4

81 - 85 3

From the above data, estimate the following:

i. Mean, median and modal wage

ii. Variance, Standard deviation and the coefficient of variation

2 The number of bicycles sold over a period 10 - month period by a bicycle dealer is presented below:

25 18 30 18 20 19 30 16 36 24

i. Estimate the mean and median number of bicycles sold.Interpret each descriptive statistics measure.

ii. Estimate the range, variance and standard deviation of the number of bicycles sold. Interpret the range and standard deviation measures.

3 The capacities (in millions of litres) of each of the four major storage Dams in Namibia are shown in the table below.

Storage Dam Capacity (litres)

Hardap 158,644

Avis 95,284

Goreangab 244,122

Von Bach 440,255

i. Draw a pie chart (with pencil & label with pen) showing the percentage of water supplied by each storage dam.

ii. What percentage of West Brom's water supply is provided by:

a) The Avis dam?

b) Hardap and Von Bach dams together?

4 5. Illustrate the following data using a component bar chart (draw with pencil & label with pen) :

YearWagesRaw MaterialsOverheads

201415103

201514123

201610114

201711084

5 The table below shows the times taken to complete, a task

Time (Sec) Frequency

38-42 7

43-47 8

48-52 29

53-57 10

58-62 18

63-67 5

68-72 7

Present the information in a histogram.(Draw with pencil & label with pen)