Asked by Charles Burns on Jul 20, 2024
Verified
A pharmaceutical company interested in measuring how often physicians prescribe a certain drug has selected a simple random sample from each of two groups: M.D.(Medical Doctors) and D.O.(Osteopaths) .What is this type of sampling called?
A) Simple random sampling.
B) Cluster sampling.
C) Stratified random sampling.
D) None of these choices.
Stratified Random Sampling
A sampling technique where the population is divided into distinct subgroups and samples are drawn from each subgroup.
Simple Random Sample
A sample in which each member of the population has an equal chance of being selected, minimizing biases in the sampling process.
M.D.
In a statistical context, this often refers to Mean Deviation, a measure of variability that averages the absolute deviations of data points from their mean.
- Comprehend the principle of sampling and the assortment of sampling methods.
Verified Answer
SP
Sadaf pugc1Jul 20, 2024
Final Answer :
C
Explanation :
This type of sampling is called stratified random sampling because the population (physicians) has been divided into two strata (M.D. and D.O.) and a simple random sample has been selected from each stratum. This allows for more accurate representation of each group within the population. Cluster sampling involves dividing the population into clusters and selecting a sample of clusters to study. Simple random sampling involves selecting individuals from the population at random without any stratification or clustering.
Learning Objectives
- Comprehend the principle of sampling and the assortment of sampling methods.