The customer help center in your company receives calls from customers who need help with some of the customized software solutions your company provides. The staff prepare the following cumulative frequency polygon (ogive) for waiting times during the last three months. What percentage of customers had waiting times exceeding 6 minutes?
A) 7%
B) 8%
C) 11%
D) 12%
E) 89%

Question

The customer help center in your company receives calls from customers who need help with some of the customized software solutions your company provides. The staff prepare the following cumulative frequency polygon (ogive) for waiting times during the last three months. What percentage of customers had waiting times exceeding 6 minutes? 
A) 7% 
B) 8% 
C) 11% 
D) 12% 
E) 89%

Quizplus · Accepted Answer

To find the percentage of customers who had waiting times exceeding 6 minutes, we follow the line for 6 minutes until it intersects with the cumulative frequency curve. Then, we draw a line straight down to the x-axis to find the corresponding percentage. This falls somewhere between 10% and 12%, and since 6 minutes is closer to 11 minutes than 10, we can estimate that around 11% of customers had waiting times exceeding 6 minutes. Therefore, the best choice is C.

The Customer Help Center in Your Company Receives Calls from Customers