Introductory Statistics 9th Edition

Published by Wiley
ISBN 10: 1-11905-571-7
ISBN 13: 978-1-11905-571-6

Chapter 3 - Section 3.1 - Measures of Center for Ungrouped Data - Exercises - Page 88: 3.14

Answer

a. mean = 958.35 median = 990 b. 20% trimmed mean= 986.083

Work Step by Step

a. mean = $27+441+530+595+699+716+872+930+933+934+1046+1065+1125+1127+1187+1199+1234+1274+1353+1480)/20 = 958.35 $ median = $(10th +11th)/2 = (934+1046)/2 = 990$ B. 20% trimmed mean, we remove 4 from both ends of the data, and we obtain $699,716,872,930,933,934,1046,1065,1125,1127,1187,1199 $ trimmed mean = $(699+716+872+930+933+934+1046+1065+1125+1127+1187+1199)/12 = 986.083$
Update this answer!

You can help us out by revising, improving and updating this answer.

Update this answer

After you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.