In Random sampling, the probability of selecting an item from the population is:-
**Core Concept**
Random sampling is a statistical method used to select a representative subset of individuals from a larger population. It aims to minimize bias and ensure that the sample is representative of the population's characteristics. In random sampling, each member of the population has an equal chance of being selected.
**Why the Correct Answer is Right**
The probability of selecting an item from the population in random sampling is indeed **equal**. This is because every individual in the population has an equal chance of being chosen, making the selection process unbiased. This is achieved through the use of random number generators or other methods that ensure each member has an equal probability of selection.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because it implies a variable probability, which is not characteristic of random sampling.
**Option B:** This option is incorrect because it implies a selection based on specific criteria, which is not random.
**Option C:** This option is incorrect because it suggests a selection based on probability, but it's not equal, which is a key feature of random sampling.
**Clinical Pearl / High-Yield Fact**
Remember that random sampling is a key principle in epidemiology and statistics, and it's essential to understand its importance in ensuring the representativeness of a sample.
**Correct Answer:** . Equal probability.