PSYC 1010 Study Guide - Final Guide: Statistical Inference, Illusory Correlation, Null Hypothesis
29 Jun 2018
School
Department
Course
Professor
1010 exam chapter 5
Sample and their population( two main samplings)
ā¢Random sampling: every member in population has equal chance
ā¢Convenience sample: uses participants who are readily available
ā¢Generalizability: ability to apply findings from one sample in one context to other
samples or context
ā¢Increase external valid though replication
Probability
ā¢central to infertile statistics beach our conclusions about a population are based on data
collected from a sample rather than on anecdotes and testimonial
ā¢Coincidence and probability
ā¢Confirmation bias: usually un intentional tendency to pay attention to evidence
that confirms what we already believe and to ignore evidence that would
disconfirm our beliefs
ā¢Illusory correlation: phenomenon of believing one sees an association between
variable who no such association exists
ā¢Expected relative-frequency probability
ā¢Personal probability: a persons own judgment about the likelihood that an event will
occur
ā¢Expected relative-frequency probability: likelihood of an event occurring, based on
the actual outcome of many trials.
Inferential statistics
ā¢descriptive and inferential both lined to probability
ā¢Inferential: use probability estimates based on same dat to decide about patterns in
population
ā¢Control group: level of independent variable the doesn't receive the treatment of interest
in study
ā¢Experimental group: level of the independent variable that receive the treatment or
intervention of interest
Developing hypothesis
ā¢Null: no different
ā¢Research: statement that postulates a difference between populations
ā¢We can do two things;
ā¢Reject the null hypothesis ( there was a difference)
ā¢Fail to reject the null hypothesis ( there was a change)
