When You Are Testing Whether Two Population Means of Two

question 21

Multiple Choice

When you are testing whether two population means of two normally distributed populations differ and the population variances are both unknown but unequal, the t test statistics will usually have a non-integer number of degrees of freedom v.In this case, you should:

• A) round down to the previous integer.
• B) round up to the next integer.
• C) assume that the population variances are equal and use v = n1 + n2 - 2.
• D) change the sample sizes until the number of degrees of freedom is an integer.

---

Definitions:

Power Users

Individuals who have a profound understanding and mastery of a particular software, system, or technology, often beyond that of an average user.

Knowledge Power

The influence and control gained through the possession or access to information and expertise.

Expert Power

The influence and authority someone holds as a result of their expertise, skills, or knowledge in a specific area.

Unbiased Way

An approach or method that is fair and impartial, not favoring one side or outcome over another, often important in research, reporting, and decision-making processes.