Answer:
Step-by-step explanation:
Given that:
The number of observations is:
6, 10, 12
If we are to use a simple random sampling without replacement, then we will have:
(6,10) (6,12) (10,12)
Here;
the sample size n = 2
The population size N = 3
For (6,10) ; The sample mean =
=
= 8
For (6,12) ; The sample mean =
=
= 9
For (10, 12) ; The sample mean =
=
= 11
The probability distribution of sample mean(x) is:
X 8 9 11
P(X=x)
Thus, the probability that the sample mean is larger than 8 is:
P(X> 8) = P(X = 9) + P(X + 11)
P(X> 8) =
P(X > 8) =
P(X> 8) =
Answer:
Ex 1: f(2)-f(1)+f(1÷2)=9÷4
Step-by-step explanation:
f(2)=2²-2×2+2=4-4+2=2
f(1)=1²-2×1+2=1-2+2=1
f(1÷2)=(1÷2)²-2×(1÷2)+2=5÷4
Answer:
B, you're correct
Step-by-step explanation:
1/6+1/6+1/6+1/6+1/6+1/6+1/6+1/6+1/6= 1 3/6 = 1 1/2
1+3/6= 1 1/2
A) adds up to 2.5, but the fraction model adds up to 1.5
C) adds up to 1, but the fraction model adds up to 1.5
D) adds up to 7/6, but the fraction model adds up to 1.5
294 cm^2 = 6 * r^2 (the cube has 6 faces)
so the radius is 7 cm
the volume is 7^3 cm^3 = 343 cm^3