In testing the hypothesis Hg : ,u 2 25 at o: = 0.025, a researcher calculated the test statistic as z : 3.1 and made the appropriate decision based on this statistic. The true population mean was later found to be 29. Select all true statements about the researcher's decision below. The researcher: T. rejected the null hypothesis [1 accepted the null hypothesis [T committed a Type I error [1 failed to reject the null hypothesis [T made a correct decision [7 committed both Type | and Type II errors T. committed a Type II error [T made a mistake in the calculations