The Mean Annual Incomes of Certified Welders Are Normally Distributed

question 64

Multiple Choice

The mean annual incomes of certified welders are normally distributed with the mean of $50,000 and a standard deviation of $2,000. The ship building association wishes to find out whether their welders earn more or less than $50,000 annually. The alternate hypothesis is that the mean is not $50,000. If the level of significance is 0.10, what is the critical value?

• A) +1.645
• B) -1.282
• C) ±1.282
• D) ±1.645

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Definitions:

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Pertaining to or characterized by clear, sound reasoning and coherent thought.

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Assessing a foreign culture purely through the lens of one's own cultural norms and values.

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The ability to understand, communicate with, and effectively interact with people across cultures by acknowledging and respecting their beliefs and behaviors.

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