PSYC 2030 Lecture Notes - Lecture 6: Feral Child, Statistical Inference, Confidence Interval
30 Mar 2016
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Document Summary
Measures of central tendency: mean (sum/# of scores, median (middle # when arranged least to greatest, mode (most frequent score) Which measure of ct is the best: mean is most commonly used, median is unaffected by outliers or extreme scores. Relationship between sample size and confidence interval: the larger the sample, the smaller the confidence interval. Reasons for large samples: high generalizability. Case history: collecting different, rich, data about 1 person. Case study weaknesses: low generalizability (in special populations, to other situations, retesting, replication, there could be biased reporting by the researcher (this is possible, but not always true) (selection of information, qualitative narrative descriptions) Case study strengths: in depth, rich, qualitative data about 1 person, necessary for unique or rare populations, can generate hypotheses, good for testing theories (to support or refute) Used to assess the opinions or attitudes of a group. Uses random probability sampling when identifying populations of interest.
