Answer:
a) cluster sampling
Step-by-step explanation:
In cluster sampling method, each member of a population is assigned to one and only one group.This means clusters are formed through probability method usually a simple random sampling.The participants in the clusters are the only one to be surveyed.
In this example, simple random sampling is used to identify 12 home rooms(cluster) where a group of 20 students (participants) in each room is given the survey.
Step-by-step explanation:
so x+y=2
a line would have to go 0,2 2,0
so the answer would be D
Answer: y=38
x=38
z=109
Step-by-step explanation:
because
Step-by-step explanation:
6а – 2а = -48
4a=-48
a=-12
Answer:
3, 4
Step-by-step explanation:
6 < 3n < 15
Divide the three "sides" by 3.
2 < n < 5
n must be between 2 and 5,a nd it must be a whole number.
n can be 3 or 4
