STEPS
1. Find the mean of the probability
distribution using the formula
με Σ ΧΡ(α)
SOLUTIO?
Probability
P[2)
Number of
Heads
X
0
8
1
2
10 cm 1100
3
m 1001
8
8
3
8.
8
TOTAL
12 = 1.5
μ =
- ΣXP(x) = 1 2 3
= 1.5
х
P/s)
X-
X Pix)
2. Subtract the mean from each
value of the random variable X.
0
0
0 - 1.5
- -1.5
8
1
3
1 - 1.5
-0.5
8
3
2
I col lol co-ICO
2 - 1.5
-0.5
8
milliollX
8
3-1.5
1.5
8
Х
Pix
X-PX)
X-
X-
2.25
3. Square the results obtained in
Step 2.
Xo
O
-1.5
8
1
3
3
-0.5
0.25
خمسة أهلية ونه ما
8
3
0.5
0.25
col collw
3
3
15
2 25
8
8​