The Data Below Shows Samples of Annual Salaries (In $1000s)

question 58

Essay

The data below shows samples of annual salaries (in $1000s) for accountants in two different firms. $$\begin{array}{l}\text { Company A}&\text { Company B }\\74.8 & 83.3 \\78.2 & 65.7 \\69.9 & 82.1 \\84 & 78.5 \\65.7 & 69.7 \\66.8 & 77.7 \\72.1 & 66.7 \\77.4 & 78.4 \\79.3 & 79.2 \\69.1 & 80.1 \\& 74.9 \\& 69.8\end{array}$$ Use Excel to determine whether the variance in salaries in Company A differs from that of Company B. Use a .10 level of significance.

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Definitions:

Premotor Cortex

A region of the frontal lobe of the brain involved in planning and coordinating movements before they are executed.

Movement Force

The force generated by muscles to produce motion, essential for physical activities and regulated by the nervous system.

Cerebral Palsy

A condition affecting body movement and muscle coordination, stemming from a stable brain injury or malformation that happens as the child's brain is being developed.

Hydrocephalus

Buildup of fluid pressure in the brain and, in infants, swelling of the head, if the flow of cerebrospinal fluid (CSF) is blocked; can result in intellectual impairment.