Twenty-Five Percent of the Employees of a Large Company Are

question 103

Short Answer

Twenty-five percent of the employees of a large company are minorities. A random sample of 7 employees is selected.
a.What is the probability that the sample contains exactly 4 minorities?
b.What is the probability that the sample contains fewer than 2 minorities?
c.What is the probability that the sample contains exactly 1 non-minority?
d.What is the expected number of minorities in the sample?
e.What is the variance of the minorities?

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Definitions:

Fixed Ratio Schedules

Fixed ratio schedules in behavioral psychology are a type of reinforcement schedule where a response is reinforced only after a specified number of responses have occurred.

Continuous Reinforcement

Continuous reinforcement is a learning process in which a behavior is rewarded every time it is performed, facilitating rapid learning.

Luck

The force that seems to operate for good or ill in a person's life, as in shaping circumstances, events, or opportunities.

Fixed Ratio

A schedule of reinforcement where a response is reinforced only after a specified number of responses, leading to a high and steady response rate.