Farming has changed from the early 1900s. In the early 20th century, machinery gradually replaced animal power. For example, in 1910 U.S. farmers used 24.2 million horses and mules and only about 1,000 tractors. By 1960, 4.6 million tractors were used and only 3.2 million horses and mules. In 1920, there were over 6 million farms in the United States. Today, there are less than 2 million. Listed below (refer to book) is the number of farms, in thousands, for each of the 50 states. Write a paragraph summarizing your findings. (Hint: develop a frequency distribution and possibly a histogram to reveal the distribution of observations and facilitate your summary)