# Psyc 1100 Quiz 2 Study Guide

**Topics:**Scientific method, Regression analysis, Causality

**Pages:**3 (510 words)

**Published:**May 3, 2013

* What they are (Some examples)

* Frequency Distributions

* Central Tendency

* Mean: Average

* Median: Middle Number

* Mode: Number that most comes up (rarely used in behavior statistics) * Graphs

* Pie Charts

* Bar Graphs, etc.

* What they’re used for

* Descriptive statistics aim to summarize a sample, rather than use the data to learn about the population that the sample of data is thought to represent. * What they tell you about your data

* Help you catch any errors or potential problems.

* Help you understand and visualize your data.

* Help you “clean” your data.

* What they don’t tell you about your data.

* Cannot infer anything from descriptive statistics; they only describe the data * Cannot be generalized to any larger group

* Inferential Statistics

* What they are (one example)

* Linear regression analyses

* Logistics regression analyses

* What they’re used for

* What they can tell you that descriptives can’t

* Allow you to compare means definitively.

* Allow you to make inferences, draw conclusions.

* Allow you to make causal statements. “The drug caused memory problems”. * What is the t-test used to compare?

* Incent by William Sealy Gosset, 1908

* It is used to determine whether two means are from the same population or two different populations.

* How do you interpret the p value?

* 5% risk is acceptable

* If p < 0.05, your results are significant.

* If p > 0.05, your results are not significant.

* Experimental Design

* Terminology (IV, DV, Confound, Control, etc.)

* Hypothesis: a testable prediction or statement about how variables are related * Dependent variable: the variable that...

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