If ΔXYZ is dilated by a scale factor of 2 about point X, which of the following is true about line A prime Y prime? Triangle XYZ is shown with line YA running vertically through the center of the figure.

A) line A prime Y prime is perpendicular to line AY.
B) line A prime Y prime is parallel to line AY.
C) line A prime Y prime passes through the center of dilation.
D) line A prime Y prime intersects with point X′.

On a certain portion of an experiment, a statistical test result yielded a p-value of 0.21. what can you conclude? 2(0.21) = 0.42 < 0.5; the test is not statistically significant. if the null hypothesis is true, one could expect to get a test statistic at least as extreme as that observed 21% of the time, so the test is not statistically significant. 0.21 > 0.05; the test is statistically significant. if the null hypothesis is true, one could expect to get a test statistic at least as extreme as that observed 79% of the time, so the test is not statistically significant. p = 1 - 0.21 = 0.79 > 0.05; the test is statistically significant.