Answer
λ = 5/min
t = 10 min
Work Step by Step
λ is the average number of calls per minute.
$t=3:20~p.m.-~3:10~p.m.=10~min$
Statistics: Informed Decisions Using Data (4th Edition)
by Sullivan III, Michael
Published by
Pearson
ISBN 10:
0321757270
ISBN 13:
978-0-32175-727-2
Chapter 6 - Section 6.3 - Assess Your Understanding - Vocabulary and Skill Building - Page 351: 4
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