Answer:
a. No
b. Stratified Random Sampling was used
Step-by-step explanation:
a. No, I don't think the group was using a simple random sampling SRS ,because statistician students takes a survey of 200 samples and the sample was distributed into different categories , which is unlikely to happen in simple random sampling.
b. I think stratified random sampling was used because this type of sampling requires the population strata to be made.
In the question, the population is 200 and it is distributed into 4 strata which are :50 first-year students, 50 sophomores, 50 juniors, and 50 seniors.
Thus, the stratified random sampling was used
If the two angles form a linear pair, the sum of the angles is 180 degrees.
If the small angle is one-third of the other, then the total is 1+1/3=4/3 of the larger angle.
By proportion,
L+L/3=4L/3=180
L=180*3/4=135 degrees
Smaller angle = L/3=45 degrees
Check: L+L/3=135+45=180 degrees, ok
Circumference of Circle=C, =2(pi)(radius)
Radius of Circle=r
Side of square=x
f(x)=area of circle
g(r)=area of square
16 feet=C+4x
C=16-4x
2(pi)(r)=16-4x
2(pi)(r)=2(8-2x)
(pi)(r)=8-2x
r=(8-2x)/(pi)
x=(8-(pi)r)/2
f(x)=(pi)(r^2)
f(x)=(pi)((8-2x)/(pi))^2
f(x)=((8-2x)^2)/(pi)
f(x)=((64-32x+4x^2))/(pi)
g(r)=((8-(pi)r)/2)^2
g(r)=((64-16(pi)r+(pi)^2(r^2))/4
Your answer would be B, all you need to do is look at the first point plotted and match it with the number you see on the x and y axis and then look at what each number means