Quick Math Question...

[QurazyQuisp]

So, I'm looking back at quizzes for my stats final, and this is part of a problem I got wrong... (We are doing Discrete Random Variables, this is in the form of P(|X-5|<=2.4) Can anyone verify if this is correct (re-worked)? (I don't remember this stuff it's been 7/8+ years since I've had to touch it)

|X-5|<=2.4:

-2.4+5 <= X <= 2.4+5

?

The above has nothing to do with probability/stats, only about equalities...

 

[marketsons1985]

...aka x is between 2.6 and 7.4? Yes that is correct.

EDIT: If you want to think about it in terms of what the question is asking, it's looking at the difference between X and 5. So you're looking at the probability that x is no more than 2.4 above or below 5.

 

[QurazyQuisp]

Ah ok, thanks. I was fine with the non absolute value ones, I just completely forgot how to deal with the inequalities.

 

[marketsons1985]

NP. By the way, I'm not to far from you, out in Grand Rapids. You all getting this ridiculous snow these past few days?

 

[QurazyQuisp]

I'm in East Lansing now, and we've been getting snow pretty consistently for the past two weeks or so, however it's nothing like what my parents have been getting in Rockford. I know they got about a foot last weekend when we maybe got 4 inches here in EL...