I have another Stats question i'm confuesed on.
classify the sample as random, systematic, covenience, stratified, or cluster.
A marketing executive fo General Motors finds that its public department has just printed envelopes with the names and addresses of all Corvette owners, She wants to do a pilot test of a new marketing strategy, so she thoroughly mixes all of the envelopes in a bin, then obtains a sample group by pulling 50 of those envelopes.
this one really confuses me. I'm not sure if the whole population is all the customers from GM and the sub groups are Corvette owners and other car owners. or if the population is all corvette owners and no sub groups. if it's the latter then the situation would be classified as random. if its the first though, it could be either Stratified or cluster. but it doesn't fall directly into either group. Stratified is when you sample from each sub group, which didn't happen. Cluster is when you sample from ALL of one sub group. which didn't happen either. any help would be great. thank you for your time!
The population is all Corvette owners. That's the only ones who had envelopes.
The 50 are a random sample of Corvette owners.
In this scenario, the population can be considered as all the customers from General Motors, and the subgroups are the Corvette owners and other car owners. The marketing executive mixed all the envelopes with names and addresses of all Corvette owners, and then pulled 50 envelopes as a sample group.
Based on this information, we can classify the sampling method used as a cluster sampling method. Cluster sampling is when the population is divided into smaller groups called clusters, and random samples are taken from these clusters. In this case, the clusters are the envelopes, and the marketing executive randomly sampled 50 of these envelopes.
It is important to note that the concept of cluster sampling is typically used when it is more practical or cost-effective to sample clusters instead of individuals. In this situation, the envelopes with names and addresses of Corvette owners are considered the clusters, and the marketing executive randomly sampled from these clusters to obtain a sample.
So, to classify the sample, we can say that the sampling method used is a cluster sampling method.