Ms. Yardley wrote four sets of ordered pairs on the whiteboard for her math students. For which set is y a function of r?
0 (-3, -2), (3, - 2), (-2, 1), (2, 1), (0, 0)

(4, - 2), (4, 2), (2, – 4), (2, 4), (4, 4)

(-1, 2), (4, 3), (-1, 5), (-6, - 2), (-2, 1)

(0, 2), (4, 5), (-3, – 3), (0, - 1), (6, - 2)

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.