An Investigator Conducts an Experiment Involving the Effects of Three

question 174

Multiple Choice

An investigator conducts an experiment involving the effects of three levels of a drug on memory. Subjects are randomly assigned to one of three conditions. A different drug level is administered in each condition. Memory is measured 10 minutes after each subject receives the drug. The following scores are recorded. The higher the score, the better the memory. Assume you are doing planned comparisons evaluating drug levels 2 and 3 using a = 0.05 and H 1 is nondirectional. What is your conclusion?

• A) accept H 0 ; the drug has the same effect at these levels
• B) retain H 0 ; we cannot conclude the drug has a different effect at these levels
• C) reject H 0 ; the groups are not significantly different
• D) reject H 0 ; the drug has different effects at these levels

---

Definitions:

Organization's Performance

A measure of how well an organization is achieving its objectives, often evaluated through metrics such as profitability, efficiency, and satisfaction levels.

Performance Appraisal

A systematic evaluation process by which an employee's job performance is assessed and documented.

Relative Standing

An individual's or entity's position or rank in comparison to others within a specific context or group.

Job Sharing

A work arrangement whereby two or more individuals share the responsibilities and duties of one full-time job, splitting the hours, benefits, and pay.