A data set of size 22 has correlation coefficient of r = -0.461. Test the significance of r at the 5% level and at the 1% level.
A) r is not significant at 5% or at 1%.
B) r is significant at 5% and at 1%.
C) r is significant at 5%, but not at 1%.

Question

Quizplus · Accepted Answer

The critical value for r with 20 degrees of freedom (n-2) at the 5% level is approximately ±0.423, and at the 1% level is approximately ±0.537. Since -0.461 is less than -0.423 but greater than -0.537, r is significant at the 5% level but not at the 1% level.

A Data Set of Size 22 Has Correlation Coefficient of R