Question

Costco wants to know if there is any way they can improve work conditions for their employees. Using its employee roaster, Costco randomly selects 40 employees and asks them a few questions. (2 points)

1. Identify the sampling method that was used (simple random sample, systematic, stratified, cluster, convenience).

2. Please explain your conclusion.

At Citrus College, students were separated into groups based on their favorite movie genre (comedy, horror, action, adventure, romance, etc.). Five were randomly selected from each group and asked to list their top three favorite movies. (2 points)

1. Identify the sampling method that was used (simple random sample, systematic, stratified, cluster, convenience).

2. Please explain your conclusion.

Answer 1

1. Using it's employee roster, Costco randomly selects 40 employees and asks them a few questions.

The sampling method that was used is simple random sample.

In this type of sampling , n number of individuals are selected randomly from a group of individuals.

In this type of sampling, every individual has an equal chance to be selected.

2. At Citrus College, students were separated into groups based on their favorite movie genre. Five were selected from each group and asked their top three favorite movies.

This type of sampling is called stratified sampling method.

In stratified sampling method, the entire population is divided into groups called as strata. Then the n number of individuals are selected from each strata to form a sample.

Here all students in college are separated into groups that is strata. Then five students are selected from each strata.