Consider the following frequency table representing the scores on a test. Scores on a Test - Class: 50–55 (Frequency: 3), 56–61 (Frequency: 4), 62–67 (Frequency: 8), 68–73 (Frequency: 6), 74–79 (Frequency: 11). Step 2 of 5: Determine the upper class boundary for the third class.

Answer

To determine the upper class boundary for a specific class, you look at the gap between the upper limit of that class and the lower limit of the next subsequent class. The third class in the table is 62–67, where its upper class limit is 67. The fourth (subsequent) class is 68–73, where its lower class limit is 68. The upper class boundary is the midpoint between these two values. Calculation: (Upper limit of 3rd class + Lower limit of 4th class) / 2 = (67 + 68) / 2 = 135 / 2 = 67.5. Therefore, the upper class boundary for the third class is 67.5.