The Mean Annual Income of Certified Welders Is Normally Distributed

question 19

Multiple Choice

The mean annual income of certified welders is normally distributed with a mean of $50,000 and a population 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 decision rule?

• A)Do not reject the null hypothesis if computed z lies between −1.645 and +1.645; otherwise,reject it.
• B)Do not reject the null hypothesis if computed z is greater than 1.645; otherwise,reject it.
• C)Do not reject the null hypothesis if computed z lies between −1.960 and +1.960; otherwise,reject it.
• D)Reject the null hypothesis if computed z is below −1.960; otherwise,reject it.

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Definitions:

Large Law Firms

Legal organizations employing a considerable number of attorneys, offering a wide range of legal services, and typically operating across multiple locations or jurisdictions.

Government Agencies

Bodies within the executive branch of government, responsible for the oversight and administration of specific functions, such as enforcement of laws and regulations.

Compensation

Payment or benefit provided to an individual, such as an employee, in exchange for their services or to compensate for losses or injuries.

Salary Range

A predetermined range of pay that an employee can expect to earn in a specific position, often based on experience, skills, and the job market.