Describe that data!
mean, median and mode
The standard normal distribution is also referred to as the _________ distribution
Z-distribution
How many types of t-tests are there?
Three
What does ANOVA stand for?
Analysis of Variance
The hungrier a person feels, the more angry they are. This is an example of a _____ relationship
positive (direct) relationship.
A variable with this level of measurement has rank ordering, a standardized scale, but no meaningful zero value.
Interval
If I want to see how many standard deviation units my raw score is from the mean, I can calculate the ________.
Z-score
Comparing the same students enthusiasm levels at the beginning of the semester and at the end of the semester would be best done using which analysis?
paired samples t-test
(aka dependent samples t-test or repeated measures t-test)
In a paired-samples t-test, your grouping variable is manipulated _______-participants, while in a independent samples t-test, your grouping variable is manipulated ________-participants.
within-participants, between-participants
The absolute vale of a correlation coefficient indicates information about the ______ of the relationship
strength
If I took the square root of this measure of variability, it tells me how much the data points tend to vary around the mean.
Hint: give the name of measure of variability I am taking the square root of.
variance
Assuming normally distributed data, what is the percentage of scores that fall between -1SD and +1SD around the mean?
68%
The t-test statistic for which type of t-test has a denominator that uses the estimated standard error?
one-sample t-test
This type of error indicates a failure to reject the null hypothesis, when the null hypothesis is actually false.
Type 2 error
This population parameter is used when notating hypotheses regarding relationships.
rho (ρ)
The difference between the highest and lowest values in the data is referred to as _________
the range
In a z-test, the z-value associated with your designated alpha is referred to as your _______.
Z-critical
Pooled variance is a component of calculating the test statistic for which t-test?
independent samples t-test
David surveyed the class on their favorite ice cream flavors: Chocolate, Neapolitan, Vanilla, Cookies and Cream or Rocky Road. To determine whether the percentage of responses for each flavor of ice cream did not significantly differ, David will perform a ___________.
Chi-square goodness of fit test
DOUBLE JEOPARDY
The portion of shared variance between two continuous, numeric variables is referred to as _____.
R2 (aka coefficient of determination)
DOUBLE JEOPARDY
Taking the deviations of each data point from the mean, squaring them, and then adding them all up is referred to as ____________
sum of squares
Assuming normally distributed data, what the percentage of scores that exceeds z = 1?
16%
One assumption of the independent samples t-test is that both groups being compared have roughly equal (i.e., not significantly different) dispersion of data around the mean. This is referred to as the assumption of ____________.
homogeneity of variance
If you were to compare college freshman, sophomores, juniors and seniors on the amount of daily caffeine they consume, it would be best to conduct a _________ and calculate the _________ test statistic.
one-way ANOVA, F test statistic (aka F ratio)
_________ conveys information about how two variables vary together but, unlike a correlation, it is not scaled.
covariance