Ellen has music practice three days a week. She practices for all of the three days 85% of the time, two days 8% of the time, one day 4% of the time, and no days 3% of the time. One week is selected at random. We know that for a probability distribution function to be discrete, it must have two characteristics. One is that the sum of the probabilities is one. What is the other characteristic?

MATLAB: An Introduction with Applications
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Author:Amos Gilat
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Ellen has music practice three days a week. She practices for all of the three days
85% of the time, two days 8% of the time, one day 4% of the time, and no days 3%
of the time. One week is selected at random.
We know that for a probability distribution function to be discrete, it must have two
characteristics. One is that the sum of the probabilities is one. What is the other
characteristic?
Transcribed Image Text:Ellen has music practice three days a week. She practices for all of the three days 85% of the time, two days 8% of the time, one day 4% of the time, and no days 3% of the time. One week is selected at random. We know that for a probability distribution function to be discrete, it must have two characteristics. One is that the sum of the probabilities is one. What is the other characteristic?
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