A Lumber Company Has Claimed That the Standard Deviation for the Lengths

question 59

Essay

A lumber company has claimed that the standard deviation for the lengths of its six-foot boards is 0.5 inch or less. To test its claim, a random sample of 17 six-foot boards is selected, and it is determined that the standard deviation of the sample is .43. Do the results of the sample support the company's claim? Use α = .1.

---

Definitions:

Approach-Avoidance Conflict

A psychological conflict that occurs when a goal or event has both attractive and repulsive aspects, leading to ambivalence.

Immune System

The body's defense mechanism against infections, diseases, and other foreign substances.

Prolonged Stress

A state of continuous stress exposure over a lengthy period, potentially leading to adverse health effects, including psychological and physical problems.

Antigens

Substances that the body recognizes as foreign and that can elicit an immune response.