Quality control is an important issue at ACME Company which manufactures light bulbs.In order to conduct testing of the life hours of their light bulbs,they randomly sampled nine light bulbs and measured how many hours they lasted.378,361,350,375,200,391,375,368,321 What is the 65^th percentile? A)335.5 B)370.5 C)380.6 D)296.8 E)375

Question

Quizplus · Accepted Answer

The 65th percentile is the value below which 65% of the data falls. In this case, the data is already sorted in ascending order: 200, 321, 350, 361, 368, 375, 375, 378, 391. Since 65% of 9 is 5.85, the 65th percentile is the average of the 5th and 6th values, which is (361 + 368) / 2 = 375.

Quality Control Is an Important Issue at ACME Company Which