The table shows the ages (in years) and salaries (in thousands of dollars) of a random sample of engineers at a company. Test the claim that M ≠ 0. Use α = 0.05. Then interpret the results in the context of the problem. If convenient, use technology.

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Age, 25 34 29 30 438 49 5235 40 Salary, y 57.5 61.2 59.9 587 87.5 674 | 89.2 85.3 69.5 75.1