Instead of going overland to reach california some families took a ship around cape barn at the tip of south america. suppose a ship leaves new york for san francisco on the first and on the fifteenth of every month at noon. at the same time a ship leaves san francisco for new york suppose also that each ship arrives exactly 6 months after it leaves. if you where on a ship leaving from new york how many ships from san francisco would you meet?

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.