TASK
MATHEMATICAL STATISTICS 1
1.Two coins and a dice are tossed once simultaneously. Let X be a random variable which states a number of the faces (pictures) happened, then determine
A. Values of the random variable.
B. Random variable space.
C. Probability of random variable values.
D. Probability distribution.
2.Let X be a random variable which has the probability distribution as follows
X=x
|
2
|
6
|
10
|
14
|
20
|
P(X=x)
|
1/4
|
1/12
|
1/6
|
1/8
|
3/8
|
Based on the probability distribution above, then determine
A.Expected values of X.
B.Variance of X.
C.E[ 3(X-1)2 – 4 ].
3.Abdullah Mahfudzi does an experiment. He plants dates seeds until he gets three dates seeds which grow fertilely.
If probability of growth of dates seeds is 30%, then determine probability of the experiment with 10 dates seeds.
REGULATIONS:
- The answers of the task must be gathered on Thursday, 5th December 2013. Deadline at 17.00 pm local time in Pasuruan City, on Thursday, 5th December 2013.
- The answers of the task must be done in sheets of paper (on the folio).
- If the answers of the task are gathered more than deadline, then they are refused.
- Please do the task well and correctly, May luck be on your hands….!!!
- Score :
Number 1a : maximum score is 5
Number 1b : maximum score is 5
Number 1c : maximum score is 5
Number 1d : maximum score is 5
Number 2a : maximum score is 5
Number 2b : maximum score is 5
Number 2c : maximum score is 5
Number 3 : maximum score is 15
