You believe that eating an apple a day is healthy and want to design an experiment to find out. You have available 40 volunteers (22 men and 18 women) from a four-year college, all between the ages of 18 and 22. Design an experiment to help you determine if this practice is healthy or not, and explain, in terms of the important principles of experimental design, why you chose the design you did.

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.