Mild
What is the measure of central tendency that serves as the mid-point of a data set and is not influenced by outliers?
What is the median?
You are looking at a two-tailed problem and see that you used a 5% cutoff on the right side and a 5% cutoff on the left side. What alpha level would this indicate that you used? (Percentage)
What is alpha = 10%?
Two different nominal variables and you’re looking at the frequency of all possible cells
What is Chi-Square test of independence?
What is power?
A widely accepted classificatory schema used to classify tests according to their measurement properties.
What is the NOIR system?
Education level (high school, bachelors, graduate...) is classified as what type of NOIR variable?
What is ordinal?
A distribution has a long tail stretching out to the right and a body squished near zero. The mean is also higher than the median. What type of distribution is this?
What is a positively skewed distribution?
When you need to make a comparison of three or more conditions and have two or more independent variables
What is factorial ANOVA?
The difference between the true mean of the population and the mean of the sample.
What is the standard error?
The distance between the predicted value and the actual Y value in the data is called a...
What is a residual?
Data about location in which someone lives is classified as what type of NOIR variable?
What is nominal?
If you take large random samples from a population with replacement, the distribution of sample means will be approximately what?
What is normally distributed?
You can use it on any repeated test, but power goes down
What are Bonferroni corrected t-tests?
The statistical technique for finding the best-fitting straight line for a set of data; used for prediction.
What is regression?
The third variable problem is addressed best (out of the tests you know so far) by what procedure?
What is multiple regression?
As a researcher, you run a study set at alpha .05. Do you want the result of the hypothesis test to have a p-value above or below this cutoff?
What is below?
In a standard normal distribution, a z-score of +1.25 means what in relation to the mean?
What is 1.25 standard deviations above the mean?
When you have two samples who have observations that are connected to each other
What is a paired samples t-test?
Yhat = a + bx. For every 1 point increase in x, y increases by...
What is b?
What is the name for the statistical symbol that represents how much of the variance is captured in the outcome when there are multiple independent variables?
What is the coefficient of determination?
What is the strength and direction?
What measure of spread only considers the middle 50% of the distribution?
What is the interquartile range?
When you need to make a comparison of a population to a sample and you know the population standard deviation
What is a z-test?
A type of variable that has fixed responses.
What is a discrete variable?
The post hoc procedure that protects the familywise error rate at any number of groups.
What is Tukey's HSD?