Test Statistic Sample Correlation Coefficient. To obtain the P -value we need to compare the test statistic to a t -distribution with 168 degrees of freedom since 170 - 2 168. Since the population correlation was expected to be non-negative the.
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ρ 0 against the alternative H A. The correlation coefficient of the sample is given by r CORREL R1 R2 564 Where R1 is the range containing the poverty data and R2 is the range containing the infant mortality data. To construct the hypothesis test.
Recall that relations in samples do not necessarily depict the same in the population.
The closer r is to zero the weaker the linear relationship. ρ 0 we obtain the following test statistic. Suppose we have large-sample correlation coefficients between blood test measures for type 1 and type 2 diseases. Or significantly different from zero.
