Standard deviation and coefficient of variation

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"Fair and Lovely" is a well-known health care and beauty company based in Sydney Australia. The company produces and markets three products lines

1. Toothpaste,

2. Body Lotion and

3. Face Wash.

Table 1 provides monthly data for a 2-year period for the following:

1. Monthly turnover for each product line

2. Monthly advertising costs

You are required to complete the following tasks in order to develop your understanding on measures of central tendency, measures of dispersion of the data and measures of association between different variables.

1. Identify the type of the data also identify the variables.

2. Organise the data into appropriate class intervals and present the following:
a. A histogram of the frequency distribution
b. An "Ogive" of the cumulative frequency distribution
c. Frequency Polygon

3. Estimate the Mean, Median, Range, Standard Deviation and Coefficient of Variation

4. Compare the risk (or variability of revenues) from three different products sales based on monthly revenue data.

5. Calculate the 25th, 50th, and 75th percentile of the first year data on advertising costs.

6. The marketing manager of Fair and Lovely has proposed to the CEO, that they invest more money on advertising in order to increase the return of the company. How can you as a analyst reporting to the CEO of the company use this statistical data to evaluate the marketing managers proposal? (Hint: Calculate correlation coefficient between revenue data of each product and advertisement costs)

Table 1. Monthly returns and costs on advertisement (in thousand dollars) of XYZ Company for two years.

Year

Months

Toothpaste (AU$)

Body Lotion (AU$)

Face wash (AU$)

Advertisement Costs (AU$)

 

 

 

 

 

Year 1

January

45

51

57

28

February

48

57

61

28

March

50

61

61

29

April

52

62

67

30

May

54

67

68

34

June

41

49

51

24

July

71

98

132

44

August

76

104

132

50

September

81

132

137

57

October

82

156

140

58

November

84

146

147

62

December

85

152

148

63

 

 

 

 

 

Year 2

January

85

156

158

70

February

55

72

70

36

March

61

73

112

37

April

66

84

121

40

May

70

95

123

43

June

21

30

32

12

July

22

31

35

13

August

25

38

38

14

September

32

38

42

15

October

37

40

44

17

November

38

46

47

22

December

38

47

50

23

Reference no: EM13874928

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