PSY 100 Lecture Notes - Frequency Distribution, Central Tendency, Fun Size
Document Summary
Defining what" part of population will be measured. Entire population is usually too large and not feasible to directly study. A sample is a partial collection of the population; ideally the members of the sample are randomly selected. If they"re not randomly selected, you risk having bias in your experiment. Also need a sample because maybe you don"t have the funds or resources to support measuring the entire population. You take the data gathered from the sample and infer that what you observed is also occurring in a similar fashion with the rest of the population. Replication of the sampling strengthens conclusions reached. Take many samples during an experimentation period. Can collect a lot of other information in addition to the main thing you"re researching. Replications can help boost your confidence in what you"re doing and finding in your experiment. Horizontal axis: range of values for the property/variable under study.
