The question mark is 100. It is a variable if you don't know
Answer:
104 units
Step-by-step explanation:
distance from (-5,2) to (1,6) is 7.21 units
distance from (1,6) to (9,-6) is 14.42 units
7.21 x 14.42 = about 104
Answer: Cluster sampling.
Step-by-step explanation:
- Cluster sampling is a sampling technique in statistics in which the researcher splits the entire population into different groups called clusters.
- After that he randomly select a sample from the clusters from the population and survey all elements of sampled clusters.
- Researcher performs his analysis on data from the sampled clusters.
In the given situation Greyhound Lines randomly selects 90 buses during a certain week and surveys all passengers on the buses.
Here, week= Cluster
Buses = Elements
Therefore , the type of sampling is used = Cluster sampling.
