Final answer:
Mendel was successful because of his careful experimental design, large sample size, statistical analysis, and detailed record keeping.
Step-by-step explanation:
Mendel was successful for several reasons. First, he used careful experimental design to ensure accurate results. Second, he worked with a large sample size of pea plants, which allowed him to calculate probabilities and predict outcomes. Third, he used statistical analysis to analyze his data and draw conclusions. Finally, he kept detailed records of his experiments, which enabled him to track and analyze his results over time.