Continuous Random Variables...

[gopunk]

my book says that:

The length of time (in minutes) it takes a student to complete a one-hour exam

is a continuous random variable, but i don't get it. because of that "in minutes", can't you count, 1, 2, 3, 4, thus making it discrete? or do they not mean whole minutes?

 

[StormRider]

It means it can take 1 minute, or 1.5 minutes, or 1.57 minutes, or 2 minutes etc...

In other words, the length of time can be any number on an interval (0, 1] on the number line (where 1 means 1 hour).

Discrete time random variable means the domain consists of a finite (or countable infinite) set of numbers. A continuous random variable has a domain with an uncountably infinite set.

 

[FatAlbo]

Out of curiousity, is this Stat/Math 390 or 311?

 

[gopunk]

<< Out of curiousity, is this Stat/Math 390 or 311? >>



stat 311... *snore*

thanks stormrider, i guess that's the only way the book would be right.

 

[Mister T]

ah... the good ole days.