A Study Was Conducted to Investigate the Effect of an Intervention

question 28

Multiple Choice

A study was conducted to investigate the effect of an intervention protocol on IQ tests.Nine randomly selected students were tested. $$\begin{array} { l c } \text { Before } & \text { After } \\100 & 106 \\111 & 112 \\93 & 95 \\92 & 90 \\99 & 107 \\85 & 100 \\117 & 126 \\110 & 105 \\98 & 110\end{array}$$
At ? = .05,test to determine if the protocol increases test scores.

• A)Reject the null hypothesis.
• B)Fail to reject the null hypothesis.
• \(\begin{array}{c}
• \begin{array}{l}
• \underline{\text { Before }}\\
• 100 \\
• 111 \\
• 93 \\
• 92 \\
• 99 \\
• 85 \\
• 117 \\
• 110 \\
• 98
• \end{array}
• \begin{array}{c}
• \underline{\text { After }} \\
• 106 \\
• 112 \\
• 95 \\
• 90 \\
• 107 \\
• 100 \\
• 126 \\
• 105 \\
• 110
• \end{array}
• \begin{array}{c}
• \underline{d}\\
• -6 \\
• -1 \\
• -2 \\
• 2 \\
• -8 \\
• -15 \\
• -9 \\
• 5 \\
• -12 \\
• \end{array}
• \begin{array}{c}
• \underline{ |d|}\\
• 6 \\
• 1 \\
• 2 \\
• 2 \\
• 8 \\
• 15 \\
• 9 \\
• 5 \\
• 12
• \end{array}
• \begin{array}{c}
• \underline{\text { Rank }} \\
• 5 \\
• 1 \\
• 2.5 \\
• 2.5 \\
• 6 \\
• 9 \\
• 7 \\
• 4 \\
• 8
• \end{array}
• \end{array}\)

---

Definitions:

Isolate DNA

The process of separating DNA from other cellular components to study its structure, function, or for genetic engineering purposes.

Replication Error

Mistakes that occur during the DNA replication process, potentially leading to mutations if not corrected by DNA repair mechanisms.

Permanent Mutation

A change in the DNA sequence that is irreversible and can be passed down to successive generations.

Complementary Strand

The sequence of DNA or RNA that is the precise partner or counterpart to a given DNA or RNA sequence, adhering to base pairing rules.