Use the Rank Correlation Coefficient to Test for a Correlation

question 98

Essay

Use the rank correlation coefficient to test for a correlation between the two variables. A
placement test is required for students desiring to take a finite mathematics course at a
university. The instructor of the course studies the relationship between students' placement
test score and final course score. A random sample of eight students yields the following data. $\begin{array}{cc}\underline {\text { Placement Score } } & \underline { \text { Final Course Score }} \\38 & 63 \\90 & 41 \\95 & 54 \\51 & 32 \\86 & 93 \\74 & 60 \\60 & 61 \\57 & 89\end{array}$ Compute the rank correlation coefficient, rs, of the data and test the claim of correlation
between placement score and final course score. Use a significance level of 0.05.

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Definitions:

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A rapid increase in growth, typically occurring during puberty.

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Impeded growth or development in living organisms or processes, often due to environmental constraints or nutritional deficiencies.

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A developmental stage covering children from approximately 6 to 12 years old, marked by significant growth in cognitive, emotional, and social areas.

Rapid Growth

A significant increase in size, capacity, or numbers in a short period of time, often used in the context of economic, biological, or population growth.