Teaching Assistants’ Stipends. A random sample of stipends of teaching assistants in economics is listed. Is there sufficient evidence at the alpha=0.05 level to conclude that the average stipend differs from $15,000? The stipends listed (in dollars) are for the academic year. 14,000 15,000 13,000 14,356 13,185 13,419 14,000 11,981 15,604 12,283 15,338 15,000

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