The Mean Gross Annual Incomes of Certified Tack Welders Are

question 5

Multiple Choice

The mean gross annual incomes of certified tack welders are normally distributed with the mean of
$50,000 and a standard deviation of $4,000. The ship building association wishes to find out
Whether their tack 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 -1.65 and +1.65; otherwise, reject it.
• B) Do not reject the null hypothesis if computed z is greater than 1.65; otherwise, reject it.
• C) Do not reject the null hypothesis if computed z lies between -1.96 and +1.96; otherwise, reject it.
• D) Reject the null hypothesis if computed z is below -1.96; otherwise, reject it.

---

Definitions:

Nonverbal Communication

The process of conveying a message without the use of words, often through body language, gestures, and facial expressions.

Business Etiquette

The set of expectations governing the social behavior and manners of individuals within a business environment.

Teamwork

Collaborative efforts of a group to achieve a common goal or complete a task in the most effective and efficient way.

Entrée Plates

The primary dishes served in a meal, often consisting of a meat or main ingredient accompanied by sides.