Suppose We Are Testing the Difference Between the Two Population

question 55

Multiple Choice

Suppose we are testing the difference between the two population means based on independent,random samples from two normally distributed populations with unknown but equal variances.If n₁ = 10 and n₂ = 10,the degrees of freedom for the t statistic is ____.

• A)19
• B)18
• C)9
• D)8
• E)20

---

Definitions:

Genetic Make-Up

The set of genes that an individual inherits from their parents, which determines one's characteristics and predispositions.

Postpartum Psychosis

A rare but severe mental illness that can affect a new mother following childbirth, characterized by extreme confusion, delusions, hallucinations, and, at times, risk of harm to oneself or the baby.

Research Participants

Individuals who partake in scientific studies, contributing data through their experiences, behaviors, or biological samples.

Ethical Concerns

Issues or situations that require a person or organization to choose between alternatives that must be evaluated as right (ethical) or wrong (unethical).