If the original population has a Normal distribution, then the distribution of the sample mean is also Normal.
If we extract random samples of size n from a population with half a μ and standard deviation σ, then the distribution of the sample mean will have the following parameters:
μ_Xbar = μ
σ_Xbar = σ/ √(n).
Where:
μ = 50
σ = 4
n = 20
So:
μ_Xbar = 50
σ_Xbar = 0.8944
Answer:
8 ft
Step-by-step explanation:
Since we are given the size of image and actual object, we need to know the magnification factor. In this case, the man is 6ft but his image is 4.5 inches. Similarly, the statue's height is not given but in the imave it is 6 inches. If 6 ft translates to 4.5 inches then we want to know what translated to 6 inches. We apply the cross multiplication.
6 ft= 4.5inch
X ft=6 inch
X=6 ft* 6 inch/4.5 inch=8 ft
Therefore, the statue is actually 8 ft tall.
Circumference of the circle is given as = 220 feet
We have to find the diameter.
Circumference is found as = 2 * PI * r
r=35.03
Diameter is 2*radius
Diameter = 
= 70.06
Hence, diameter of the circle is 70.06 feet.
B because the other 3 graphs don’t fit the equation
Answer:
37°
Step-by-step explanation:
∠ECF= ∠ACG
∠ACG= 90° - ∠GAC= 90° - 53°= 37°
