The following table shows the average January high temperature and the average July high temperature for 10 major cities around the world.

a. Construct a scatterplot for the data. Estimate or compute the correlation coefficient. Based on this correlation coefficient, would you conclude that January and July temperatures are correlated for these cities? Explain.
b. Notice that the first five cities in the table are in the Northern Hemisphere and the next five are in the Southern Hemisphere. How does this change your view of the correlation? Would you now conclude that January and July temperatures are correlated for these cities? Explain.

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City January high July high Berlin Geneva Kabul Montreal Prague Auckland Buenos Aires Sydney Santiago Melbourne 74 39 36 21 34 73 92 78 74 56 2 78 59 56 78