Step 5 of 7: Identify the midpoint of the fifth class.

Answer

To find the midpoint of a class in a grouped frequency distribution, you use the formula: Midpoint = (Lower Class Limit + Upper Class Limit) / 2. First, identify the fifth class from the provided table. The classes listed are: (1) 1108-1157, (2) 1158-1207, (3) 1208-1257, (4) 1258-1307, (5) 1308-1357, and (6) 1358-1407. The fifth class is 1308-1357. Now, apply the formula using the lower limit (1308) and the upper limit (1357): Midpoint = (1308 + 1357) / 2 = 2665 / 2 = 1332.5. Therefore, the midpoint of the fifth class is 1332.5.