The following table presents the numbers of employees, by age group, who were promoted, or not promoted, in a sample drawn from a certain industry during the past year.

Can you conclude that the people in some age groups are more likely to be promoted than those in other age groups? Use the α = 0.05 level of significance.

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Age Under 30 30-39 40-49 50 and Over Promoted 16 22 26 15 Not Promoted 38 39 45 38