An equal number of two-parent families, each with three children younger than ten years old were interviewed in cities of populations ranging from 25,000 to 75,000. Interviewers collected data on (average) yearly living expenses for housing (rental/mortgage payments), food, and clothing. The collected living expense data were rounded to the nearest 100 dollars. Compute the correlation coefficient between the population data and living expense data shown in the following table:
City Population (in 1000s) Average Yearly Living Expense (in $ 100s)
25................................................................72
30................................................................65
35................................................................78
40................................................................70
50................................................................79
60................................................................85
65................................................................83
75................................................................88