Some archaeologists theorize that ancient Egyptians interbred with several different immigrant populations over thousands of years. To see if there is any indication of changes in body structure that might have resulted, they measured the breadth length of 30 skulls of male Egyptians dated from 4000 B.C.E and 30 others dated 200 B.C.E. The archaeologists want to test if was a significant increase in the mean skull breadth length from 4000 B.C.E to 200 B.C.E (indicating an increase over time). Let My be the population mean skull breadth length of male Egyptians from 4000 B.C.E and let H2 be the population mean skull breadth length of male Egyptians from 200 B.C.E. What are the appropriate hypotheses? a.) Ho: H1 H2 c.) Ho: Y1 = Y2 vs. Ha: Y1