Population proportions across the three countries

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As markets become more and more international, many ?rms invest in research aimed at determining the maximum possible extent of sales in foreign mar- kets. A U.S. manufacturer of coffeemakers wants to ?nd out whether the company's market share and the market shares of two main competitors are about the same in three European countries to which all three companies export their products. The results of a market survey are summarized in the following table. The data are random samples of 150 consumers in each country. Conduct the test of equality of population proportions across the three countries.

Country

Company	France 55	England 38	Spain 24	Total 117
First competitor	28	30	21	79
Second competitor	20	18	31	69
Other	47	64	74	185
Total	150	150	150	450

20Burt Helm and Paula Lehman, "Buying Clicks to a Tragedy," BusinessWeek, May 7, 2007, p. 42. 21Louise Lee, "HP Sees a Gold Mine in Data Mining," BusinessWeek, April 30, 2007, p. 71.

Reference no: EM13981810

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