The following table lists the market shares of the four firms in a particular industry in 2019
Question:
The following table lists the market shares of the four firms in a particular industry in 2019 and total sales (in $ billions) for each firm in 2020.
a. Specify the competing hypotheses to test whether the market shares in 2019 are not valid in 2020.
b. Calculate the value of the test statistic and the p-value.
c. At the 1% significance level, do the sample data suggest that the market shares changed from 2019 to 2020?
Transcribed Image Text:
Firm 1 ~ 3 2 4 Market Share in 2019 0.40 0.30 0.20 0.10 Total Sales in 2020 200 180 100 70
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a b c Ho P 040 P2 030 ...View the full answer
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Related Book For
Business Statistics Communicating With Numbers
ISBN: 9781260716306
4th Edition
Authors: Sanjiv Jaggia, Alison Kelly
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