Consider the following data representing the price of laptop computers (in dollars). 1429, 1284, 1288, 1294, 1468, 1425, 1256, 1374, 1356, 1461, 1428, 1197, 1331, 1143, 1127, 1279, 1475, 1423, 1117, 1423, 1151. Step 7 of 7 : Compute the cumulative frequency of the third class. The classes provided in the table are: 1116-1175, 1176-1235, 1236-1295, 1296-1355, 1356-1415, and 1416-1475.

Answer

1. Identify the classes: The first three classes are: Class 1: 1116-1175, Class 2: 1176-1235, and Class 3: 1236-1295. 2. Calculate the frequency for each of the first three classes by counting how many data points fall into each range from the provided list: (1429, 1284, 1288, 1294, 1468, 1425, 1256, 1374, 1356, 1461, 1428, 1197, 1331, 1143, 1127, 1279, 1475, 1423, 1117, 1423, 1151). For Class 1 (1116-1175): 1143, 1127, 1117, 1151. (Frequency = 4). For Class 2 (1176-1235): 1197. (Frequency = 1). For Class 3 (1236-1295): 1284, 1288, 1294, 1256, 1279. (Frequency = 5). 3. Calculate the cumulative frequency for the third class: The cumulative frequency is the running total of frequencies. Cumulative Frequency for Class 3 = (Frequency of Class 1) + (Frequency of Class 2) + (Frequency of Class 3) = 4 + 1 + 5 = 10. The cumulative frequency of the third class is 10.