A Medical Researcher Is Interested in Determining If There Is $\chi ^ { 2 }$

question 1

Multiple Choice

A medical researcher is interested in determining if there is a relationship between adults over 50 who exercise regularly and low, moderate, and high blood pressure. A random sample of 236 adults over 50 is selected and the results are given below. Calculate the chi-square test statistic $\chi ^ { 2 }$ to test the claim that regular exercise and low, moderate, and high blood pressure are independent. Use $\alpha = 0.01$ .
$\begin{array} { l | c c c } \text { Blood Pressure } & \text { Low } & \text { Moderate } & \text { High } \\\hline \text { Reg. Exercise } & 35 & 62 & 25 \\\text { No Reg. Exercise } & 21 & 65 & 28\end{array}$

• A) 3.473
• B) 16.183
• C) 18.112
• D) 6.003

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Definitions:

Object Recognition

The ability of the brain to identify and assign meaning to objects using visual cues.

Visual Agnosia

A neurological disorder characterized by the inability to recognize objects despite having normal vision.

Ventral Stream

A pathway in the brain's visual cortex involved in object recognition and form representation, running from the primary visual cortex to the lower temporal lobe.

Dorsal Stream

The pathway in the brain that processes spatial and motion information, extending from the occipital lobe to the parietal lobe, often referred to as the "where" pathway.