Which best summarizes the purpose of a W-4 form? A) It helps determine the amount of taxes withheld from an individual's paycheck. B) It helps determine when taxes are due and if money is owned by the IRS. C) It helps determine whether a person has dependents who must also pay taxes. D) It helps determine when a person need to pay local incomes.

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.