Answer to Question 1
Sampling is a technique for choosing participants for a research study. Representative sampling is the selection of samples in which each person in the population is assigned a known and likely chance of being selected. Random sampling is a type of representative sampling in which each person in the population of interest has an equal chance of being chosen so that the random sample mirrors the larger population and reflects its characteristics and dynamics. Random sampling only works, however, when a researcher has a list of the entire population he or she wants to sample. Choosing individuals at random from a list of the total population, although considered scientifically sound, is often difficult, or even impossible, because it is not often possible to acquire a complete list of all individuals in a population. For this reason, social scientists use representative sampling. To properly conduct a representative sample, the social scientist need only gather a significant number of individuals, ensuring that the characteristics of the sample arerepresentative of the greater population.
Answer to Question 2
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Random X-chromosome inactivation in a calico cat.
Models of some representative proteins drawn to a common scale
Gas molecules have no bonds to other molecules and move in random motion.
There Is a Difference between Natural and Added Sugars
If the random variable x is exponentially distributed with parameter λ = 4, then P(x ≤ ...