Answer:
The mean and standard deviation of Y are, 94 and 0.28 respectively.
Step-by-step explanation:
Let the random variable , 'Test grades on the last statistics exam' be X.
Then according to the question,
E(X) = 78 ------------(1)
and
= 0.14------------(2)
Now, according to the question,
Y = 2(X - 31)
⇒E(Y) = 2(E(X) - 31)
=
= 94 ----------------(4)
and
V(Y) = 4V(X)
⇒
⇒ = 0.28
So, the mean and standard deviation of Y are, 94 and 0.28 respectively.
The diameter is 8, so the radius is 4 (cut the diameter in half)
r = 4
The height is h = 3
Plug this into the formula below which is the volume of a cylinder
V = pi*r^2*h
V = pi*4^2*3
V = pi*16*3
V = pi*48
V = 48pi <--- this is the exact volume in terms of pi
V = 48*3.14
V = 150.72 <---this is the approximate volume
V = 151 cubic cm is the approximate volume if we round to the nearest whole number
Answer: choice A
Answer:
Option C
Step-by-step explanation:
Hope this helps.
Answer:
c) FJ and GH
Step-by-step explanation: