Annie wants to estimate the average number of ap classes a student at her high school takes. she decides to randomly select 6 classes and use all the students in those 6 classes to estimate the average. what type of sampling did annie use? select the correct answer below: a. cluster samplingb. stratified samplingc. convenience samplingd. systematic sampling

Cluster sampling

Step-by-step explanation:

To find, which type of sampling used, we first know the definition of cluster sampling.

Definition of cluster sampling:

Cluster sampling is a type of sampling method in which the population is divided into already existing groups or clusters. Then a sample of the cluster is selected randomly from the population.

In this problem, population is high school and sample of the cluster is 6 classes.  So, Annie used Cluster sampling in this problem.

  n=   0.0000 - 0.3750 i  

  n=   0.0000 + 0.3750 i

step-by-step explanation:

one of these should be correct

only 10/60 isn't equivalent

hope this : )