Which term refers to a sample where each individual has an equal chance of selection?

Which term refers to a sample where each individual has an equal chance of selection?

• A. Random Sample
• B. Independent Random Sampling
• C. Normal Distribution
• D. Unit Normal Table

Answer: (A)

Every member of the population having the same chance of being selected defines a random sample. Using a random mechanism—like drawing names from a hat or using a random number generator—ensures no one is favored, helping the sample better reflect the population. The other terms describe different ideas: a normal distribution is about how values spread, a unit normal table is a reference for standard normal probabilities, and independent random sampling refers to independence between draws rather than guaranteeing equal selection probabilities. So the term that matches the description is a random sample.

Every member of the population having the same chance of being selected defines a random sample. Using a random mechanism—like drawing names from a hat or using a random number generator—ensures no one is favored, helping the sample better reflect the population. The other terms describe different ideas: a normal distribution is about how values spread, a unit normal table is a reference for standard normal probabilities, and independent random sampling refers to independence between draws rather than guaranteeing equal selection probabilities. So the term that matches the description is a random sample.