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MATLAB: An Introduction with Applications
6th Edition
ISBN: 9781119256830
Author: Amos Gilat
Publisher: John Wiley & Sons Inc
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
Transcribed Image Text:A USA based cable broadband company wants to investigate whether it's east coasts customers have a higher average
customer satisfaction score than compared to it's west coast customers. The customer survey asks for a score between 1
and 5, with 1 being poor and 5 being excellent.
174 east coast customers are surveyed, and the sample mean is 3.35 with a sample standard deviation of 0.51. For the
west coast, 355 customers are surveyed, and the sample mean is 3.24 with a sample standard deviation of 0.52.

Transcribed Image Text:What is the null and alternative hypothesis for this test?
○ Ho : Xeast - Xwest 0 vs Ha : Xeast - Ăwest ‡ 0
=
Hopeast
O Hopeast
-
:
· µwest ≤ 0 vs Ha μeast
west
=
0 vs Ha east
-
- Hwest > 0
Mwest 0
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