TASK

TASK

MATHEMATICAL STATISTICS 1

1.Two coins and a dice is tossed simultaneously.  Let X be a random variable which states a number the faces (pictures) is 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 grows fertilely.

If probability of growth of dates seeds is 30%, then determine probability of the experiment with 10 dates seeds.

REGULATIONS:

1. The answers of the task must be gathered on Thursday, 5^th December 2013. Deadline at 17.00 pm local time in Pasuruan City, on Thursday, 5^th December 2013.
2. The answers of the task must be done in sheets of paper (on the folio).
3. If the answers of the task is gathered more than deadline, then they are refused.
4. Please do the task well and correctly, May luck be on your hands….!!!
5. 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