For Questions Below , Use the Following: a Researcher Selects

question 82

Short Answer

For questions below , use the following: A researcher selects a random sample of 8 high school students. Each student is tested on both Need Achievement and Mechanical Aptitude. The scores were: $$\begin{array} { c c c } \text { Subject } & \text { Need Achievement } & \text { Mechanical Aptitude } \\1 & 12 & 10 \\2 & 2 & 3 \\3 & 5 & 7 \\4 & 9 & 5 \\5 & 11 & 9 \\6 & 10 & 8 \\7 & 4 & 6 \\8 & 1 & 3\end{array}$$
-Find the Pearson r correlation between Need Achievement and Mechanical Aptitude.

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Definitions:

Straight Hairline

A form of hairline where the hair grows in a straight line across the forehead.

Recessive

A genetic trait that is expressed only when two copies of the gene are present, not seen when a dominant gene is present.

Phenotypic Ratio

The proportion of different phenotypes observed in the offspring of a particular genetic cross.

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Small rodents often used as pets or in research as model organisms for biological studies.