The Life Expectancy of a Fluorescent Light Bulb Is Given

question 108

Multiple Choice

The life expectancy of a fluorescent light bulb is given by the number of hours that it will burn. From the following frequency distribution, find the sample standard deviation of life of this type of bulb.   $$\begin{array} { | l | l | l | l | } \hline \text { Life of bulb (hours) } & \text { Midpoint } x & \text { Frequency } f & \text { Product } x f \\\hline -0.5 - 499.5 & & 2 & \\\hline 499.5 - 999.5 & & 11 & \\\hline 999.5 - 1,499.5 & &14 & \\\hline 1,499.5 - 1,999.5 & &16 & \\\hline 1,999.5 - 2,499.5 & &28 & \\\hline 2,499.5 - 2,999.5 & & 34 & \\\hline 2,999.5 - 3,499.5 & & 14 & \\\hline 3,499.5 - 3,999.5 && 6 & \\\hline\end{array}$$ Round your answer to the nearest whole number.

• A) 864 h
• B) 836 h
• C) 830 h
• D) 798 h
• E) 753 h

---

Definitions:

Role Clarity

The degree to which job responsibilities and expectations are clearly understood by employees.

Social Integration

The process through which individuals or groups are incorporated into the social structure and culture of a community or society.

Goal-setting Programs

Structured plans designed to define and achieve specific objectives within a company or team, enhancing motivation and performance.

Individual Goal Setting

The process of establishing specific, measurable, achievable, relevant, and time-bound objectives at the individual level, influencing motivation and performance.