Stats 101 - Chapter 1 Exam Question &
Answers 2025
Polls and Surveys - CORRECT ANSWERS ✔✔The process of collecting
data from a sample, or subset, of the population in order to determine
information about the whole population.
Should include the target population, sample selection method, sample
size, margin of error, date of the survey and the exact question.
Goal of polls and surveys - CORRECT ANSWERS ✔✔To obtain a
REPRESENTATIVE Sample (a sample that reflects the characteristics in
the population).
Random Sampling - CORRECT ANSWERS ✔✔Involves each unit being
chosen entirely by chance and hence avoids subjective and other biases
and allows for the calculation of likely size of sampling errors. The larger
the sample, the more effective the randomisation is in producing a
representative sample.
Simple random sampling - CORRECT ANSWERS ✔✔Form of random
sampling where every unit has an equal chance of being chosen.
Other types of random sampling - CORRECT ANSWERS ✔✔Stratified
sampling, cluster sampling and systematic sampling.
