Descriptive Statistics
The number of participants, or observations, in your sample.
n
This test is used to compare the mean scores of two groups.
T-Test
This test is used to look at the relationship between variables.
Correlation
The goal of an experiment is to identify what type of relationship between variables?
Causal.
H1: People who live in Portland are more likely to believe 40 degrees is 'winter weather' than people who live in Alaska.
Independent Samples T-Test (one-tailed)
Mean, median, and mode are all measures of __________________ .
Central tendency
This test is used to compare expected and observed frequencies.
Chi-Square
This test is used to predict the value of one variable based on the value of another.
Regression
The three things you need to establish causality are (1) correlation, (2) no other plausible explanations, and (3) ______________.
Timing
H2: There will be a positive relationship between living in Oregon and loving the outdoors.
Correlation
The average distance between your scores and the mean.
Standard Deviation
Independent variables used in chi square must be at what level of measurement?
Nominal
Variables used in correlation must be at which levels of measurement? ___________ OR ___________.
Interval or Ratio
A measure of the dependent variable before the manipulation treatment is called the __________.
Pretest
H3: There will be a difference between liberal, moderate, and conservative females AND liberal, moderate, and conservative males in terms of how much confidence they have that elections in the U.S. are fair.
Two-Way ANOVA
What is the range of the following dataset?
1, 4, 4, 1, 5, 7, 1, 2, 2, 7
Independent variables in ANOVAs must be at which levels of measurement? ________ OR ________.
Nominal or Ordinal
Pearson product correlation coefficients are always a number between _______ and _______.
-1 and 1.
An experiment where your treatment groups are based on two or more independent variables is called ________________.
Factorial Design
H4: Amount of sleep will predict levels of stress in college students.
Regression
If the variance of your dataset is 4, what is your standard deviation?
SD = 2
You want to know if there is a difference between short and tall people in terms of their marital status. Why can't you answer that question with an independent samples t-test (two-tailed)?
The dependent variable is not interval or ratio.
In a correlation, the amount of shared variance between two variables is ___________ .
r^2
This experimental design only has 2 observations total.
Posttest-only control group design.
H5: There will be a difference between students of different class standing (freshmen, sophomore, junior, senior), students of different economic class (lower, middle class, upper), and students of different marital status (married, single) regarding their level of stress in college.
Factorial ANOVA