The Final Exam Scores of 10 Randomly Selected Statistics Students $\text { Use } \alpha = 0.01$

question 13

Essay

The final exam scores of 10 randomly selected statistics students and the number of hours they studied for the exam are given below. Calculate Spearman's rank correlation coefficient. Can you conclude that there is a correlation between the scores on the test and the times spent studying? $\text { Use } \alpha = 0.01$ $$\begin{array} { l | c c c c c c c c c c } \text { Hours } & 6 & 8 & 5 & 11 & 5 & 7 & 7 & 8 & 9 & 6 \\\hline \text { Scores } & 68 & 83 & 63 & 91 & 69 & 81 & 88 & 93 & 93 & 74\end{array}$$

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Definitions:

Isotopes

Variants of a particular chemical element that differ in neutron number, and consequently in mass, but not in chemical properties.

Radioisotope

A radioactive isotope of an element, used in various scientific applications including medicine and radiometric dating.

Stable Isotope

A non-radioactive form of an element’s isotope, which does not change or decay over time.

Radiation

The emission or transmission of energy in the form of waves or particles through space or through a material medium.