BUS 082 Lecture Notes - Lecture 2: Simple Random Sample, Sampling Frame, Sampling Error

• School: College of The Sequoias
• Department: Business (BUS)
• Course: BUS 082
• Professor: bettencourt

Document Summary

Collecting data from a sample is less time-consuming and costly than surveying the entire population, more practical. Selection is easy, inexpensive, quick, people elect other (snowball) List of items in the population that can be sampled. E. g. population lists, customer databases, directories etc. Inaccurate or biased results if parts of the population are excluded. Items are chosen without regard to their probability of occurrence. Quota sample pre-set quotas of groups chosen. Items chosen randomly, sometimes using probabilities that match those in the. Experts select most appropriate items/people by convenience. Every individual has an equal chance of being selected. Often obtained via a random number generator or software. Selecting individual in same position of each group. Decide on sample size n, divide frame of n individuals into groups of k. Randomly select one individual from first group, select that position in. Divide frames into strata according to a characteristic.