Answer:
12. d= 14, C=14π, A=49π
13. r= 13, d=26, A=169π
14. r=9, C=18π, A=81π
15. r=10, d=20, C=20π
Step-by-step explanation:
Answer:
12.94 dollars.
Step-by-step explanation:
Answer: 
Step-by-step explanation:
Answer:
) Cluster sample.
Step-by-step explanation:
Here are the options
A) Multistage sample.
B) Stratified sample.
C) Cluster sample.
D) Simple random sample.
E) Convenience sample.
A cluster sample is when a population is divided into groups known as clusters. Samples are then randomly selected from this sample. It is a method of probability sampling used for large populations.
The airline first divided the population of travellers by months travelled. this is the cluster. From within the cluster, 10 samples are then chosen
Advantages of a cluster sample
- it is faster
- it is less expensive
- It reduces variability
Disadvantages of a cluster sample
- it only works well when population can be divided into clusters
- It is affected by sampling error
Answer: A
Step-by-step explanation:
1/(1/3)=3/1
