Testing r
Let’s return to our data from Ohio regarding the percentage of the population with at least four years of college and the percentage of growth in per capita income (Table 9-10). We’ll develop a test for the population correlation coefficient r.
TABLE 9-10 Education and Income Growth Percentages | ||||||
x | 9.9 | 11.4 | 8.1 | 14.7 | 8.5 | 12.6 |
y | 37.1 | 43 | 33.4 | 47.1 | 26.5 | 40.2 |
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