The manager of a personnel company is in the process of examining her company€™s advertising programs. Currently, the company advertises in each of the three local newspapers for a wide variety of positions, including computer programmers, secretaries, and receptionists. The manager has decided that only one newspaper will be used if it can be determined that there are differences between the newspapers in the number of inquiries. The following experiment was performed. For 1 week (6 days), six different jobs were advertised in each of the three newspapers. The number of inquiries was counted, and the results appear in the accompanying table.

Newspaper

a. What techniques should be considered to apply in reaching a decision? What are the required conditions are satisfied?

b. Assuming that the data are not normally distributed, can we conclude at the 5% significance level that differences exist between the newspapers€™ abilities to attract potential employees?

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Newspaper Job Advertised Receptionist Systems analyst Junior secretary Computer programmer Legal secretary Office manager 14 17 12 9. 25 20 23 12 15 10 10 9 4