Bess Has Conducted a Pretest-Posttest Control-Group Study to Raise Math

question 167

Multiple Choice

Bess has conducted a pretest-posttest control-group study to raise math scores among fifth-grade students who have failed math. She has controlled the potential problem of _________ because she has randomly assigned the students to the experimental and control groups.

• A) instrumentation
• B) statistical regression
• C) selection
• D) history

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Definitions:

\(d = 4\)

An equation representing that the value of the variable \(d\) is equal to 4.

\(a _ { 1 }\)

Often represents the first term in a sequence or series in mathematics, particularly in formulas involving arithmetic or geometric sequences.

\(a _ { k + 1 }\)

An element in a sequence, described as the next term (k+1) following the kth term.

\(a _ { 5 }\)

Typically denotes the fifth term in a sequence or series, depending on the context of its use.