वह नमूनाकरण (sampling) तकनीक जिसमें जनसंख्या के प्रत्येक 10वें तत्व को व्यवस्थित रूप से चुना जाता है, क्या कहलाती है?

Purposive sampling is categorized under which type of sampling technique?

A heterogeneous population of farms is divided into 3 strata for stratified sampling. The strata sizes are 50, 100, and 150. A total sample size of 60 is to be selected. Consider the following statements: A. Equal allocation: 20 units are allocated to each stratum. B. Proportional allocation: 10, 20, and 30 units are allocated to strata 1, 2, and 3 respectively. Which of the statements given above is/are correct regarding these allocation methods?