54mp71n6 M3+h0d5 in Chem

What is a population in the context of sampling?

• A small group selected for study

• The whole group we are interested in

• A random selection of individuals

• A group chosen based on certain characteristics

What is a sample?

• The entire population

• A type of survey

• A subset of the population used for study

• A complete collection of data

Why might conducting a census be impractical?

• It takes too much time and money

• It is more accurate than sampling

• It only works for small populations

• It ensures unbiased results

Which of the following is NOT a main method of sampling?

• Random Sampling

• Systematic Sampling

• Cluster Sampling

• Repetitive Sampling

How does random sampling work?

• Selecting members based on characteristics

• Choosing members entirely by chance

• Picking every 10th person in a list

• Dividing the population into groups first

What is systematic sampling?

• Selecting members at regular intervals

• Choosing members randomly

• Dividing the population into groups first

• Selecting all members of a cluster

What is the key feature of stratified sampling?

• Selecting groups entirely at random

• Choosing members based on fixed intervals

• Dividing the population into categories and sampling proportionally

• Sampling only one part of the population

What makes cluster sampling different from stratified sampling?

• It only selects individuals, not groups

• It randomly selects entire groups instead of individuals

• It is the same as systematic sampling

• It ensures every group is equally represented

Why is random sampling considered effective?

• It ensures data is always accurate

• It allows researchers to choose only the best participants

• It helps avoid bias and represents the population fairly

• It is the easiest way to collect data

In stratified sampling, how is the sample size for each group determined?

• By choosing an equal number from each group

• Based on the proportion of each group in the whole population

• By selecting all members from the largest group

• Randomly, without considering group size