Surfstat.australia: an online text in introductory Statistics

THE PRICE OF UNLEADED PETROL

Average daily price of unleaded petrol throughout July 1997
(a) in Sydney and (b) in Newcastle and the Central Coast
Source: The Newcastle Herald, Saturday August 23 1997

DatePrice (cents/litre)
in July 1997 SydneyNewcastle/CC
1 72.5 74.7
2 72.6 74.2
3 71.7 73.8
4 73.1 73.6
7 70.5 73.3
8 73.1 73.1
9 71.8 75.5
10 70.9 76.6
11 70.8 76.3
14 70.1 75.9
15 72.6 75.6
16 71.6 75.1
17 70.5 74.4
18 70.2 73.7
21 71.0 73.0
22 73.1 72.6
23 71.9 72.1
24 71.3 75.3
25 72.8 76.0
28 71.3 72.8
29 72.7 72.1
30 71.3 72.1
31 70.5 72.0

Here are the data as an Excel file. Note that the Newcastle/CC prices are both higher and more variable than the Sydney prices.

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