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.

table 1

step-by-step explanation:

1-16

2-32

4-64

8-128

all multiples of 16

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