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homework help

rgrocks

New member
Joined
Oct 9, 2009
Messages
18
in class we have just learned about discrete and continuous random variables. however again i still dont know what to do.

the problem ask
let X represent the difference between the number of heads and the number of tails obtained when a coin is tossed "n" times. What are the possible values of X?

i know this is probably a discrete random variable because u cant have non integers numbers for tosses and a difference.

this is how i think its done but its probably wrong cause it leads nowhere

X= H(n)-T(n)
X= n, n-1, n-2...-n infinity because the max value of X can only be N (assuming n heads and 0 tails) and the lowest it can be is is -n (0 heads and n tails)

please help
 

Subhotosh Khan

Super Moderator
Staff member
Joined
Jun 18, 2007
Messages
18,091
rgrocks said:
in class we have just learned about discrete and continuous random variables. however again i still dont know what to do.

the problem ask
let X represent the difference between the number of heads and the number of tails obtained when a coin is tossed "n" times. What are the possible values of X? 0 ? X ? n

i know this is probably a discrete random variable because u cant have non integers numbers for tosses and a difference.

this is how i think its done but its probably wrong cause it leads nowhere

X= H(n)-T(n)
X= n, n-1, n-2...-n infinity because the max value of X can only be N (assuming n heads and 0 tails) and the lowest it can be is is -n (0 heads and n tails)

please help
 

rgrocks

New member
Joined
Oct 9, 2009
Messages
18
umm... can u help me solve the problem?
 
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