# Differention [math]

Classified in Psychology and Sociology

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What does p < .05 indicate? The result Is significant, we can reject the null hypothesis, we can accept the Alternative hypothesis

Two types of t-tests Independent samples t-test:Group of Participants divided into two sub-groups (mutually exclusive) *Asking both groups exactly the same Question and compare answers from the two independent groups.

Paired sample t-test (dependent-samples T-test)
Same group of participants (without Dividing them into sub-groups)

One-Way Anova: IV: categorical variable with more than two groups DV: continious

ex: IV: students major with three levels (physics, math, chemistry) DV: iq score

Two-Way Anova IV: two IVS that are or can be transformed into categorical variables DV: continuos variable

Correlation: when you want to examine the degree and direction of relationship between two ore more than two continuous variables

Simple linear regression when one continuous variable as Your independent variable + one continuous variable as your dependent variable

Multiple linear regression (1) When DV is continuous Variable, more than two continuous IVs. (2) When DV is continuous variable, IVs are Categorical variables. ** (not required)

One-sample Chi-square test (goodness of fit test)
Only one categorical variable. And You want to see whether or not the distribution across different levels is Balanced.Nonparametric test: the branch of inferential Statistics that is appropriate when the level of measurement is nominal or Ordinal and when data are not normally distributed.Null hypothesis: expected and observed Frequencies are the same/You can hypothesize that expected Frequencies among groups are equal; or you can hypothesize they are not equal.