Question: The following table lists the market share of the four firms in a particular industry in 2010 and total sales for each firm in 2011.
![1039_Firm.png](https://secure.tutorsglobe.com/CMSImages/1039_Firm.png)
a. Specify the competing hypotheses to test whether the market shares in 2010 are not valid in 2011.
b. Calculate the value of the test statistic.
c. At the 1% significance level, what is the critical value?
d. Do the sample data suggest that the market shares changed from 2010 to 2011?