Describe Variables
A form of nonprobability sampling that consists of collecting data from the group that is available.
What is convenience sampling?
The number of values that are "free to be unknown."
What is degrees of freedom?
A test used when you are looking for a difference in the mean value of an interval-level or a ratio-level variable.
What is t-test?
The percentage of the variance in the dependent or outcome variable that is explained by the model.
What is R-squared value?
Differences between the sample and the population that occur due to randomization or chance.
What is sampling error?
The test used if you are looking for a relationship between two variables that are normally distributed and are at the interval or ratio level.
What is Pearson's correlation coefficient?
The test used when comparing the means from a single dependent variable among two or more groups or samples.
What is ANOVA?
Technique for analyzing the relationship between a single independent variable and a single interval or ratio-level dependent variable, enabling the researcher to make a prediction about a future outcome based on the research data included in the analysis.
What is linear regression?
The ability to find a difference or an association when one actually exists.
What is power?
The test used to determine whether there is a relationship between two variables that are ordinal, interval, or ratio level but don't meet the full assumptions for use of the Pearson's correlation coefficient.
What is Spearman correlation coefficient?
Samples that do not have a relationship with one another.
A statistical method used to look at the relationship between a dependent variable and multiple independent variables to develop a prediction equation based on the research data included in the analysis.
What is multiple regression?
The error made when a researcher incorrectly rejects the null hypothesis, when he or she concludes there is a significant relationship but there really is not.
What is type one error?
Rules that need to be met before selecting the best test such as independent group, random selection, level of measurement.
What are assumptions?
The equal spread of one variable around all the levels of another variable.
What is homoscedasticity?
Method for analyzing the relationship between multiple independent variables and a single dependent or outcome variable when the outcome is binary (only has 2 categories).
What is logistic regression?
The error made when a researcher accepts the null incorrectly, missing an association that is really there.
What is type two error?
The level of measurement required as dependent variable for Chi-square test.
What is nominal or ordinal-level?
A test used with independent samples of nominal or ordinal-level data with output that includes Fisher's exact test.
What is Pearson's chi-square?
The probability of the outcome occurring divided by the probability of the outcome not occurring.
What is odds ratio?