The list of students in this junior high school was stratified by grade, yielding three strata: grades 7, 8, and 9. A simple random sample of students was selected from each grade. Table 61.1 shows ...

Simple Random Sampling The method of simple random sampling (METHOD=SRS) selects units with equal probability and without replacement. Each possible sample of n different units out of N has the same ...

Proof of the central limit theorem for the sample mean can be obtained in the case of independent and identically distributed random variables through the moment generating function under some ...

Representative Sample vs. Random Sample: An Overview Representative sampling and random sampling are two techniques to help ensure that data is accurate and unbiased. These sampling techniques are ...