And R Suppose we let L to be the event of months of the year with 31 days, and R
be the event of months whose name Contain the letter r. find the following
probabilities
1. Pr(R)
2. Pr(L)
3. Pr(RnL)
4. Pr(R/L)
5 Pr(L/R)​

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.