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

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Definitions:

Subsistence

The basic means by which individuals or groups support themselves at a minimum level of subsistence, often involving self-sufficiency without significant trade or economic exchange.

Foreign Affiliation

The association or connection of an individual or entity with a country or organization outside of their own.

Trade Network

A trade network is a complex system of economic exchange involving the movement of goods and services across different regions or countries.

Public Utilities

Companies or organizations that provide essential services such as water, electricity, natural gas, and telecommunications to the public, typically subject to government regulation.