Ineed on the last two. i just cant figure them out. my mind isnt meant to know everything.

Zack and tia played chess for 50 min they put the chessboard away at 11: 20 when did they start

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.

Ineed ! what is the connection between ratios, fractions, and percents? give an example with your answer.