(b) Based on the performance of those who took the GRE exam between July 1, 2004 and June 30, 2007, the average Verbal Reasoning score was calculated to be 462. In 2011 the average verbal score was slightly higher. Do these data provide convincing evidence that the average GRE Verbal Reasoning score has changed since 2004? In symbols, the hypotheses are: O Ho: H July, 2004 5 H June, 2007 Ha: H July, 2004 HJune, 2007 O Ho: HJuly, 2004 # H June, 2007 Ha: HJuly, 2004 HJune, 2007 Ho: H July, 2004 - HJune, 2007 Ha: HJuly, 2004 # HJune, 2007