问题如下:
1. Batten wants to determine whether the sample correlation between the Stellar and CPIENG variables (-0.1452) is statistically significant. The critical value for the test statistic at the 0.05 level of significance is approximately 1.96. Batten should conclude that the statistical relationship between Stellar and CPIENG is:
选项:
A.significant, because the calculated test statistic has a lower absolute value than the critical value for the test statistic.
B.significant, because the calculated test statistic has a higher absolute value than the critical value for the test statistic.
C.not significant, because the calculated test statistic has a higher absolute value than the critical value for the test statistic.
解释:
B is correct.
because the calculated test statistic is
Because the absolute value of t = -2.3017 is greater than 1.96, the correlation coefficient is statistically significant. For a regression with one independent variable, the t-value (and significance) for the slope coefficient (which is -2.3014) should equal the t-value (and significance) of the correlation coefficient. The slight difference between these two t-values is caused by rounding error.
这个解析对应讲义哪个知识点啊?