1.

Use the time series shown to answer the following questions:

a. What was the sales figure for the second quarter of 1998?

b. Which quarter and year produced the highest sales figure for Polar Cream Ltd?

c. Which quarter and year produced the lowest sales figure for Polar Cream Ltd?

d. Give a reason why sales are lowest in the third quarter of each year.

e. Why do you think that sales peak in the first quarter of each year?

f. Give some figures to show why the manager of Polar Cream Ltd is justified in saying that sales are rising.

g. Make a prediction for the company's sales for the third quarter of the year 2000.

h. State a couple of features or components of time series that are visible in this plot.

2. The table below shows the number of bicycles sold by a chain of shops over a 18 day period.

Day of Week
M
Tu
W
Th
F
Sa
Su
M
Tu
W
Th
F
Sa
Su
M
Tu
W
Th
F
Sa
Su
M
Number of cycles sold
46
56
68
115
160
156
162
49
53
71
99
132
146
136
45
67
74
93
123
139
120
42

a. Draw a time series graph for the above data.

b. Comment on any features or components of the graph.

3. A movie company gave the following chart showing the attendances at its cinemas in a city for the first 6 weeks of the release of a particular movie. The figures are given in hundreds.

 
Monday
Tuesday
Wednesday
Thursday
Friday
Saturday
Sunday
Week 1

43

51
60
58
51
67
49
Week 2
58
61
76
75
73
82
71
Week 3
76
79
76
83
85
89
83
Week 4
68
73
73
80
82
86
81
Week 5
63
65
63
62
58
70
61

a. Draw a time series graph for the above data.

b. Comment on any features or components of the graph.