You are the product manager for brand 4 in a large food company. The company president has complained that a competing b

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You are the product manager for brand 4 in a large food company.
The company president has complained that a competing brand, called
brand 2, has higher average sales. The data services group has
stored the latest product sales (saleb2 and saleb4) and price data
(apriceb2 and apriceb4) in a file named Storet
described in Chapter 10 appendix.
a. Based on a statistical hypothesis test, does the president
have strong evidence to support her complaint? Show all statistical
work and reasoning.
b. After analyzing the data, you note that a large outlier of
value 971 is contained in the sample for brand 2. Repeat part a
with this extreme observation removed. What do you now conclude
about the president’s complaint?
Data
link(Storet):