Question
Numbeo.com collects data from users in cities around the world on prices of a basket of goods and services and uses these data to determine
Numbeo.com collects data from users in cities around the world on prices of a basket of goods and services and uses these data to determine a cost of living index. This index scales New York City as 100 and expresses the cost of living in other cities as a percentage of the New York City cost. For example, in 2009, the cost of living index in Paris was
127.82,
which means that it cost
27.82%
more to live in Paris than New York City that year. The accompanying scatterplot shows the index for 2017 plotted against the 2009 index for
38
cities worldwide on which the website collected data in both years. Complete parts a through e below.
Cost of Living 2009 | Cost of Living 2017 | |
---|---|---|
100.14 | 101.94 | |
100 | 100 | |
106.8 | 92.09 | |
99.5 | 91.42 | |
112.48 | 91.21 | |
127.82 | 89.98 | |
126.6 | 88.49 | |
108.54 | 88.25 | |
74.66 | 88.07 | |
105.49 | 87.04 | |
102.07 | 85.89 | |
109.37 | 84.32 | |
117.53 | 82.68 | |
74.5 | 79.24 | |
109.5 | 75.98 | |
80.42 | 72.88 | |
115.25 | 72.32 | |
101.8 | 70.42 | |
77.57 | 63.17 | |
66.43 | 62.03 | |
58.01 | 60.68 | |
70.46 | 58.43 | |
52.59 | 55.96 | |
90.97 | 55.94 | |
79.86 | 55.01 | |
39.85 | 54.15 | |
68.8 | 52.91 | |
74.18 | 50.87 | |
63.8 | 48.64 | |
54.95 | 46.32 | |
69.16 | 41.52 | |
49.63 | 39.28 | |
58.52 | 38.18 | |
63.24 | 36.49 | |
44.25 | 32.66 | |
36.77 | 31.28 | |
34.9 | 30.52 | |
34.78 | 28.09 | |
Cost of Living 2009 | Cost of Living 2017 |
c) Find the correlation.
r=
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