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20.01.2021 •
Mathematics
Stephen curry plays for the golden state warriors an touts a 90% free throw shooting record. if he shot 12 free throws in a game appromely how many did he miss.
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Ответ:
a) Joint ptobability distribution
b) P(X<= 1 and Y <= 1) = P(X<= 1) * P(Y<=1) = 0.56
c) P(X + Y = 0)=0.3
d) P(X + Y <= 1)=0.53
Step-by-step explanation:
We have to construct the joint probability table with the marginal probabilities of X and Y.
X can take values from 0 to 2, and Y can take values from 0 to 4.
We can calculate each point of the joint probability as:
Then, the joint probabilities are:
X=0Y=0Px=0.5Px=0.6P(0,0)=0.3
X=0Y=1Px=0.5Px=0.1P(0,1)=0.05
X=0Y=2Px=0.5Px=0.05P(0,2)=0.025
X=0Y=3Px=0.5Px=0.05P(0,3)=0.025
X=0Y=4Px=0.5Px=0.2P(0,4)=0.1
X=1Y=0Px=0.3Px=0.6P(1,0)=0.18
X=1Y=1Px=0.3Px=0.1P(1,1)=0.03
X=1Y=2Px=0.3Px=0.05P(1,2)=0.015
X=1Y=3Px=0.3Px=0.05P(1,3)=0.015
X=1Y=4Px=0.3Px=0.2P(1,4)=0.06
X=2Y=0Px=0.2Px=0.6P(2,0)=0.12
X=2Y=1Px=0.2Px=0.1P(2,1)=0.02
X=2Y=2Px=0.2Px=0.05P(2,2)=0.01
X=2Y=3Px=0.2Px=0.05P(2,3)=0.01
X=2Y=4Px=0.2Px=0.2P(2,4)=0.04
We can write it in the form of a matrix:
b) From the joint probability P(X<= 1 and Y <= 1) is equal to
We can calculate P(X<= 1) * P(Y<=1)
Both calculations give the same result.
c) Probability of no violations
d) P(X + Y <= 1)