Generating the Research Idea and ANOVA
There is no difference or association between variables that is any greater or less than would be expected by chance.
What is the null hypothesis?
The ability to find a difference or association when one actually exists.
What is power?
The number values that are free to be unknown.
What are degrees of freedom?
A relationship between at least 2 variables
What is correlation?
You are asked to provide feedback about the quality of your nurse manager’s interpersonal interactions with colleagues and patients as part of her annual evaluation. The options are poor, fair, strong. These responses represent this type of variable.
What is an ordinal variable?
When you do not have enough statistical strength to show a difference or an association.
What is failing to reject the null hypothesis?
The chance of making a type II error.
What is beta (B)?
You are reading a study that examines the impact of stress on diabetes. ______ would be the independent variable.
What is stress?
The significance level, usually 0.05. The probability of incorrectly rejecting the null hypothesis, or making a type I error.
What is the alpha (a)?
The extent to which a difference/relationship exists between variables in a population (the size of the difference you are attempting to find).
What is effect size?
Either the positive or negative nature of the relationship . If positive, both variables move in the same direction; if negative, when one variable increases the other decreases, and vice versa.
What is 'direction of the relationship'?
Researchers examined the relationship between interpersonal violence and health in college age women. The researchers administered a psychological distress questionnaire which produced a score on a scale of 0-12. ______ would be an appropriate measure of central tendency to consider for this variable.
What is ANY measure of central tendency? (mean, median or mode can all be used for ratio data)
This occurs when a subject is being exposed to more than one treatment over time; and the order of the treatment received impacts the outcome.
What are latency or position effects in repeat measures ANOVA
How sample sizes are calculated.
What is a power analysis?
This tells you what the probability is that a subject actually has the disease given a positive test result.
What is positive predictive value (PPV)?
ANOVA is the abbreviation for this.
Analysis of Variance
The error made when a researcher accepts the null incorrectly, missing an association that is really there (sometimes called a power error).
What is a type II error?
Equal spread of one variable around all the levels of another variable.
What is Homoscedasticity?
In this situation ninety five percent of the area falls within two standard deviations of the mean.
What is a normal distribution?