A Study Was Conducted to Investigate the Effect of an Intervention

question 25

Essay

A study was conducted to investigate the effect of an intervention protocol on IQ tests.Nine randomly selected students were tested. $$\begin{array} { r r r } \text { Before } & \text { After } \\100 & 106 \\111 & 112 \\93 & 95 \\92 & 90 \\99 & 107 \\85 & 100 \\117 & 126 \\110 & 105 \\98 & 110\end{array}$$
-Set up the null and alternative hypotheses for the claim that the intervention protocol is effective in increasing scores.

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Definitions:

SAT Math Scores

Quantitative data reflecting individuals’ performance on the mathematics section of the SAT examination.

Frequency Distribution

A summary of how often different values occur within a dataset, often represented in a table or graph.

Students

Individuals engaged in learning at educational institutions.

Frequency Polygon

A frequency polygon is a graphical representation of the distribution of a dataset. It uses a series of connected dots or lines at the midpoints of each interval to show frequencies.