If the Sample Sizes Are Not Equal,then the Pooled Variance

question 49

Multiple Choice

If the sample sizes are not equal,then the pooled variance estimate should be calculated ____.

• A)using the unweighted mean of the variances
• B)using a weighted mean of the variances
• C)by reducing the size of one group to equal the size of the other group

---

Definitions:

Addition Polymer

Polymers formed by the sequential addition of monomer units with double or triple bonds, resulting in a long chain molecule without the loss of any small molecule byproducts.

Orlon

A synthetic fiber known for its strength and resistance to weathering, often used in clothing and home furnishings.

Kevlar

A strong synthetic fiber known for its high tensile strength and thermal stability, used in body armor and various applications.

Poly(isobutylene)

Poly(isobutylene) is a polymer made from the monomer isobutylene, used in the manufacture of inner tubes, adhesives, and sealants.