## Probability Exercise #0

#### Please answer the following questions:

#### Description

Quantum mechanics inherently involves the ideas of probability. In order to
learn and practice the terminology of probability that we will need, let us
first look at the following example.

#### Questions

Given the following number containing the first 25 digits: 3.141592653589793238462643,
find

- the total of all the digits
- the probability of finding each of the digits
- the most probable digit
- the median digit
- the expectation value (mean) of the digits
- the standard deviation of the distribution.

#### References

This exercise is taken from Problem 1.2, p. 10, in *Introduction to Quantum
Mechanics*, David J. Griffiths, Prentice Hall, New Jersey, 1995.

#### Credits

Question rewritten by Larry Cain.