Random Variable
Random event:
A random event is an event whose outcome can not be predicted. Rolling a die or tossing a coin can be examples.
Random variable:
A random variable is a variable whose value is we don't know.
A random variable is used to quantify the output of the random event. We can define a random variable as s capital letter; let it be X in our example.
Example:
We were rolling a die two times and received numbers 3 and 5; so, we can say that a random variable is X = 3 + 5 =8.
Simulating a random variable with Python:
To simulate an experiment in Python we will use the function from the NumPy library: .choice(values, size = size, replace = True)
values- a list of possible outcomes of the event.size- the number of times we repeat the experiment.replace = True- it can be equal to False, but in this course, we will not change this parameter.
The experiment of rolling a six-sided die five times.
1234567891011import numpy as np experiment = np.random.choice(range(1,7), size = 5, replace = True) random_value = sum(experiment) print("The outcomes of the experiment are:", experiment) print("The Random value is equal to:", random_value)
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Random event:
A random event is an event whose outcome can not be predicted. Rolling a die or tossing a coin can be examples.
Random variable:
A random variable is a variable whose value is we don't know.
A random variable is used to quantify the output of the random event. We can define a random variable as s capital letter; let it be X in our example.
Example:
We were rolling a die two times and received numbers 3 and 5; so, we can say that a random variable is X = 3 + 5 =8.
Simulating a random variable with Python:
To simulate an experiment in Python we will use the function from the NumPy library: .choice(values, size = size, replace = True)
values- a list of possible outcomes of the event.size- the number of times we repeat the experiment.replace = True- it can be equal to False, but in this course, we will not change this parameter.
The experiment of rolling a six-sided die five times.
1234567891011import numpy as np experiment = np.random.choice(range(1,7), size = 5, replace = True) random_value = sum(experiment) print("The outcomes of the experiment are:", experiment) print("The Random value is equal to:", random_value)
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