please corret me if i am incorrect in my understanding of a RV,PMF or anything else but as i understand it a random variable simply maps a expirmental outcome to a real number. And a probability mass function simply gives the probabilty that a number will occur.(adsbygoogle = window.adsbygoogle || []).push({});

Now my question is this: why cant we simply map a expiremental outcome to a probability rather than use a random variable to map from the sample space a to a real number then the map a real number to a probability via the PMF?

**Physics Forums - The Fusion of Science and Community**

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Why are random variables needed?

Loading...

Similar Threads - random variables needed | Date |
---|---|

A Keeping Randomized Variable in Regression? | May 29, 2017 |

I Random Variables Mutually independent | Apr 8, 2017 |

I Equivalent definitions of random variable | Jan 16, 2017 |

Need Some Mathematical Guidance Regarding Random Variables | Aug 30, 2013 |

Let X be a random variable representing the number of times you need to roll (includi | Jan 1, 2008 |

**Physics Forums - The Fusion of Science and Community**