Quiz 2 Flashcards
(119 cards)
What two types of variables are there?
Independent and dependent
What determines the dependent variable?
Other variables in the study
What is the dependent variable?
The outcome of interest
What is the independent variable used to explain?
Outcome of interest (the dependent variable)
What is another name for the independent variable? Why?
Predictor variable because they’re used to predict the dependent variable
What does variance mean?
Diversity in data for a single variable
What does variance reflect?
How the values for a variable are dispersed.
What is standard deviation?
Square root of the variance.
What is distribution?
Refers to how the findings are dispersed.
What is frequency distribution?
The spread for how frequently each category occurs or is separated.
What are the mean, median, and mode most commonly used to measure?
Central tendency.
What is the mean?
Average of all values for a variable. Sum of all the values divided by the number of values.
What is mode?
Values that occurs most frequently.
Median?
Value that falls in the middle of the distribution when the numbers are in numeric order.
What is the alpha level most commonly set at?
0.05
If a p value >0.05 what does that mean?
There is no statistical significance of the results.
If a p value is <0.05 what does that mean?
There is statistical significance in the results.
What is a nominal variable?
No numbers. Example: yes/no.
What is an ordinal variable?
Variables in order. 1st, 2nd, 3rd place. Ranking order, do not tell anything else.
What is an interval variable? What is this type of variable commonly used for?
There are equal distances between variables on a tool or scale. Example: thermometer. Opinions/attitudes like preassigning numbers for pain rating.
What is a ratio variable?
Absolute 0. Either you have it or don’t have it. Each value has the same distance between the measures and has a true zero.
What is the most rigorous variable?
Ratio variable.
What variables are involved in parametric data? Assumption or no assumption about population?
Ratio, interval. Assumption about population.
What variables are involved in non-parametric data?
Nominal, ordinal. No assumption about population.