z-test/t-test
What’s an example of a key word in an experiment description that would indicate that we should run a one-tailed test?
More/less, greater/less than, etc
What is the term we used in the unit to refer to the IV?
Factor
What is on type of chi-squared test?
Goodness of fit/Test of independence
The type of graph we use to visualize correlations is called a ____
a scatterplot
A researcher believes nurses are absent from work more frequently when they score higher on a test of “psychological burnout”
Correlation
Name that term: equal to event’s relative frequency in the population of all possible events that can occur
Probability
When we average the scores in a column/row we _____ the cells
Collapse
We use non-parametric procedures with what type(s) of data?
Categorical (nominal/ordinal)
If a positive relationship on the graph is present, what does the graph look like?
Diagonal line going up from left to right
Two-way ANOVA
In a normal distribution with shaded tails, what is the shaded part referred to as?
Region of Rejection
T/F: Interaction refers to the impact of one factor on the DV
F, that is the definition of a Main Effect
What is the null hypothesis for a Goodness of Fit test?
All frequencies in the population are equal
How do you calculate the proportion of variance accounted for?
r-squared
Laura asks whether attending a private school versus a public school leads to higher or lower performance on a test of social schools
z-test
T/F: We run a z-test with the population standard deviation is known
True
What is a one-way ANOVA?
1 IV, different levels (or conditions)
What does the term expected frequencies refer to?
frequency we expect in a category if the sample data perfectly represent the distribution of frequencies in the population described by H0
What is the strength of a relationship if with a correlation coefficient of .08?
Weak
A researcher wants to know the frequency with which people voted in the last election and were satisfied with officials elective
Define Type 1 error
What is the main difference between a within-subjects design and a between-subjects design?
Within-subjects uses the same sample for each condition, between-subjects has a different sample for each condition
Name 2/5 of the assumptions of a Goodness of Fit chi-squared test
1. Participants are categorized along one variable having two or more categories, and we count the frequency in each category
2. Each participant can be in only one category
3. Category membership is independent
4. We include the responses of all participants in the study
5. The fe must be at least 5 per category
What does the correlation coefficient tell us?
Describes the important characteristics of relationship (e.g. strength)
We investigate if a period of time feels longer or shorter when people are bored compared to when they are not bored
2 sample t-test, independent samples