Question

step 2 of 2: determine the cumulative frequency of the fourth class.
mid-level manager travel
days traveling frequency
0 - 8 18
9 - 17 27
18 - 26 34
27 - 35 6
36 - 44 2
45 and above 1

Explanation:

Step1: Identify the fourth class

The fourth class is 18-26, with frequency 34.

Step2: Sum first 4 class frequencies

Add frequencies of classes 0-8, 9-17, 27-35? No, correct order: 0-8 (18), 9-17 (27), 18-26 (34). Wait, no: cumulative frequency for 4th class is sum of first 4 classes: $18 + 27 + 34 + 6$? No, wait class order: 1. 0-8, 2.9-17, 3.18-26, 4.27-35. Oh right, fourth class is 27-35. So sum first 4 classes:
$18 + 27 + 34 + 6$

Step3: Calculate the total

$18 + 27 = 45$; $45 + 34 = 79$; $79 + 6 = 85$

Answer:

85