Using the frequency polygon below, what range of test scores was most popular? 

• A. 72
• B. 70-74
• C. 70.5-74.5
• D. 67-77

Answer: (B)

Verified step by step guidance

1. Step 1: Observe the frequency polygon provided in the image. A frequency polygon is a graphical representation of data where points are plotted at the midpoints of intervals and connected by straight lines.
2. Step 2: Identify the peak of the frequency polygon, which represents the interval with the highest frequency. In this case, the peak occurs at the test score interval centered around 72, where the frequency is 9.
3. Step 3: Determine the range of test scores corresponding to the interval around the peak. The interval is typically defined by the boundaries of the class or bin. For example, if the midpoint is 72, the range could be 70-74 or 70.5-74.5 depending on the bin width.
4. Step 4: Consider the options provided in the problem. Match the interval containing the peak frequency to the correct range of test scores. The most popular range is the one that includes the midpoint of 72.
5. Step 5: Verify the interpretation of the frequency polygon and ensure the selected range aligns with the graphical data. The range with the highest frequency is the answer.