In an Experiment Designed to Study the Effects of Illumination

question 59

Essay

In an experiment designed to study the effects of illumination level on task performance, subjects were required to insert a fine-tipped probe into the eyeholes of ten needles in rapid succession both for a low light level with black background and a higher level with a white background. Each data value is the time (sec) required to complete the task.
Subject $$\begin{array} { l | c c c c c c c c c } \hline & \mathbf { 1 } & \mathbf { 2 } & \mathbf { 3 } & \mathbf { 4 } & \mathbf { 5 } & \mathbf { 6 } & \mathbf { 7 } & \mathbf { 8 } & \mathbf { 9 } \\\hline \text { Black } & 25.01 & 41.05 & 27.47 & 25.74 & 24.96 & 28.84 & 25.85 & 20.89 & 32.05 \\\text { White } & 16.61 & 24.98 & 24.59 & 19.68 & 16.07 & 20.84 & 18.23 & 19.50 & 22.96 \\\hline\end{array}$$ Compute in interval estimate for the difference between true average task time under the high illumination level and true average time under the low level.

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Definitions:

Status Cues

Social signals or indicators that reveal or imply the social standing or rank of an individual within a community or society.

White Lab Coats

A garment worn by scientists, doctors, and laboratory technicians as a symbol of professionalism and to maintain hygiene.

Sociologists

Professionals who study social behavior, societal changes, and the social institutions and processes that influence human behavior and societies.

Status Cues

Indicators or signals that provide information about an individual's social standing or position in society.