Answer:
A & C
Step-by-step explanation:
A, because all the data is going to the right, and C, because most of the numbers are between 10 and 17.
Given mean μ = 7.6 and standard deviation σ =3.1
The z score value for x= 5 is given by
Z = 
Z = 
Z = -0.8387
The Z- score value rounded to nearest tenth is -0.8
The correct answer choice is A. -0.8
<span>It is not clear whether the populations are proportional to the radii or to the areas, but I seem they are proportional to the areas, which is to say to the square of the radii. So China's population % should be (17%)(3.4/3.2)^2 = sorry I don't bring a calculator right now. But you can solve it easily.</span>
