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Farming has changed from the early 1900s. In the early 20th century, machinery gradually
Chapter 0, Problem 48(choose chapter or problem)
Farming has changed from the early 1900s. In the early 20th century, machinery gradually replaced animal power. For example, in 1910 U.S. farms 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 fewer than 2 million. Listed below is the number of farms, in thousands, for each of the 50 states. Write a paragraph summarizing your findings
Questions & Answers
QUESTION:
Farming has changed from the early 1900s. In the early 20th century, machinery gradually replaced animal power. For example, in 1910 U.S. farms 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 fewer than 2 million. Listed below is the number of farms, in thousands, for each of the 50 states. Write a paragraph summarizing your findings
ANSWER:Step 1 of 3
If is the number of classes and is the number of observations, then for class intervals, select the smallest such that .
In this case, . If , then which is less than . So, will not work. If , then which is greater than . So, number of classes will be 6 .
If is the highest observed value and is the lowest observed value, then for the class interval or class width , select such that
Here, and . So must be selected such that
Since, is close to 35 , class width is rounded up to 35 .