Answered: A large retail company keeps sales data…

Computer Networking: A Top-Down Approach (7th Edition)

7th Edition

ISBN:9780133594140

Author:James Kurose, Keith Ross

Publisher:James Kurose, Keith Ross

Chapter1: Computer Networks And The Internet

Section: Chapter Questions

Problem R1RQ: What is the difference between a host and an end system? List several different types of end...

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Question

A large retail company keeps sales data local to the individual branches where sales transactions
were performed. To compute overall sales statistics, the company wants to avoid sending the full sales data set to
a central server. Instead, only aggregated sales information (sum, average, minimum, variance, median, maximum)
is sent from each branch to the central site. Which of the following statements are correct?
a) The overall sum can be derived from the sums per branch.
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b) The overall average can be derived from the averages per branch.
c) The overall minimum can be derived from the minimums per branch.
d) The overall variance can be derived from the variances per branch.
e) The overall median can be derived from the medians per branch.
f) The overall maximum can be derived from the maximums per branch.

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