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:

Genes

Units of DNA that are responsible for determining the characteristics and traits that are inherited from parents to offspring.

Chromosome

A structure within the cell nucleus made up of DNA and proteins that contains the genetic material of an organism.

Alleles

Variants of a gene that occur at the same place on a chromosome, contributing to the diversity of genetically influenced traits.

Gametes

Reproductive cells (sperm in males and ova in females) that unite during sexual reproduction to form a new organism.