Defining Random Variables and Probability Distributions
Statistics and Probability · Flashcards · Application
STATISTICS AND PROBABILITY · FLASHCARDS
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QUESTION
Identify the random variable: flip a coin; let
X
X
X
be the number of heads. What is
X
X
X
?
QUESTION
Identify all possible values of
X
X
X
: roll two dice;
X
X
X
is the sum. What values can
X
X
X
take?
QUESTION
What is
P
(
X
=
1
)
P(X=1)
P
(
X
=
1
)
if
X
X
X
is the number of heads in
2
2
2
fair coin flips?
Tap to flip before you grade
ANSWER
1
2
\frac{1}{2}
2
1
. HT and TH each give 1 head, so 2 out of 4 outcomes.
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