THE NEXT QUESTIONS ARE BASED ON THE FOLLOWING INFORMATION:
In a recent survey,200 top executives were asked how many hours they spend each year in community service.The data are presented below.
-Calculate the quantities 
, 
,and 
.
Definitions:
Random Samples
Random samples are a method of selecting a subset of individuals from a population in which each individual has an equal chance of being chosen, used to ensure generalizability of results.
Naturalistic Observation
Observing and recording behavior in naturally occurring situations without trying to manipulate and control the situation.
Chimpanzee Societies
Complex social structures formed by chimpanzees, characterized by hierarchical ranks, cooperation, and communication.
Economic Status
The social standing or class of an individual or group often measured by income, wealth, education, and occupation.
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