Two Australian soft drink companies, A and B, have recently conducted aggressive advertising campaigns in order to maintain and possibly increase their respective shares of the soft drink market. These two companies enjoy a dominant position in the market. Before the advertising campaigns began, the market share of company A was 40%, while company B had 35%. Other competitors accounted for the remaining 25%.

Required:

To determine whether these market shares changed after the advertising campaigns, a marketing analyst solicited the preferences of a random sample of 400 soft drink consumers.

a) The table below shows the data from the survey. Complete the table below.

Company

A

B

Others

Total

Observed Expected

x'

204

164

32

400

400

The p value of the test statistic is 0.0001. Write a conclusion based on the given p-value. (6

Marks)