SAT Scores for Students Selected Randomly from Two Different Schools

question 17

Essay

SAT scores for students selected randomly from two different schools are shown in the table.At a significance level of 0.05,does the Wilcoxon rank sum test provide evidence of a difference between the two schools? $$\begin{array} {ccc|ccc} &{ \text { School A } } & &&{ \text { School B } } \\\hline 550 & 480 & 670 & 460 & 580 & 620 \\400 & 700 & 520 & 380 & 680 & 570 \\540 & 740 & 560 & 660 & 500 & 480 \\360 & 560 & 650 & & 600 & 550\end{array}$$

---

Definitions:

Isovolumetric Contraction

A phase of the cardiac cycle during which the ventricles contract with no change in blood volume, because all heart valves are closed.

Pressure

The force exerted by a substance per unit area on another substance or on a surface, measured in units such as Pascals.

Ventricular Repolarization

The process by which the heart's ventricles return to their resting state after contraction, indicated by the T-wave in an ECG.

ECG

Electrocardiogram, a test that records the electrical activity of the heart to detect heart problems.