Question 1191421
Here's how to determine the class intervals from the given midpoints:

1. **Find the Class Width:**

   The class width is the difference between consecutive midpoints. In this case:

   22 - 17 = 5
   27 - 22 = 5

   The class width is consistent (5), which is what we expect.

2. **Determine the Boundaries:**

   * **For the midpoint 17:**
      * Subtract half the class width from the midpoint to get the lower boundary: 17 - (5/2) = 17 - 2.5 = 14.5
      * Add half the class width to the midpoint to get the upper boundary: 17 + (5/2) = 17 + 2.5 = 19.5

   * **For the midpoint 22:**
      * Lower boundary: 22 - (5/2) = 22 - 2.5 = 19.5
      * Upper boundary: 22 + (5/2) = 22 + 2.5 = 24.5

   * **For the midpoint 27:**
      * Lower boundary: 27 - (5/2) = 27 - 2.5 = 24.5
      * Upper boundary: 27 + (5/2) = 27 + 2.5 = 29.5

3. **Write the Class Intervals:**

   * 14.5 - 19.5
   * 19.5 - 24.5
   * 24.5 - 29.5