Answer:
Stratified sampling
Step-by-step explanation:
Samples may be classified as:
Convenient: Sample drawn from a conveniently available pool.
Random: Basically, put all the options into a hat and drawn some of them.
Systematic: Every kth element is taken. For example, you want to survey something on the street, you interview every 5th person, for example.
Cluster: Divides population into groups, called clusters, and each element in the cluster is surveyed.
Stratified: Also divides the population into groups. However, then only some elements of the group are surveyed.
In this question:
Population divided into groups, and random samples are drawn from the groups. This is a mark of stratified sampling.
a-b-c
that's the answer the negative sign affects what's in the bracket
Answer:
<u>We can conclude that Δ XYZ ≅ Δ RST by AAS postulate</u>
Step-by-step explanation:
Δ XYZ and Δ RST are congruents by AAS postulate because:
1. Their non-included sides YZ and ST are equal (10 units = 10 units).
2. Their angles ∠Y and ∠S are equal.
3. Their angles ∠X and ∠R are equal.
4.Their non-included sides XZ and RT are equal.
<u>Now, we can conclude that Δ XYZ ≅ Δ RST by AAS postulate.</u>
