Question

consider the following frequency table representing the scores on a test.
scores on a test
class frequency
40-51 12
52-63 6
-75 3
-87 5
88-99 8
step 1 of 3: determine the class width of each class.

Explanation:

Step1: Subtract lower from upper class limit

For any class, e.g., 40-51: $51 - 40 = 11$

Step2: Add 1 to get class width

$11 + 1 = 12$
Verify with another class (e.g., 52-63): $63 - 52 + 1 = 12$

Answer:

12