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Generating the Research Idea and ANOVA
Sample Size, Effect Size and Power
Chi-Square and Student T-test
Correlation Coefficients
Descriptive Statistics
100

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?

100

The ability to find a difference or association when one actually exists.

What is power?

100

The number values that are free to be unknown.

What are degrees of freedom?

100

A relationship between at least 2 variables

What is correlation?

100

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?

200

When you do not have enough statistical strength to show a difference or an association.

What is failing to reject the null hypothesis?

200

The chance of making a type II error.

What is beta (B)?

200
A test used with independent samples of nominal or ordinal level data.
What is Chi-square?
200
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 (r)
200

You are reading a study that examines the impact of stress on diabetes. ______ would be the independent variable.

What is stress?

300

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)?

300

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?

300
Samples that do not have a relationship with each other.
What are independent samples?
300

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'?

300

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)

400

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

400

How sample sizes are calculated.

What is a power analysis?

400
Paired or related groups or the same sample at a different time.
What are dependent samples?
400
The amount of variance in one variable that is explained by the second variable, determined by multiplying the coefficient of determination by 100.
What is percentage of variance?
400

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)?

500

ANOVA is the abbreviation for this.

Analysis of Variance

500

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?

500
Used when you are looking for a difference in the mean value of an interval-level or ratio-level variable
What is a student T -test?
500

Equal spread of one variable around all the levels of another variable.

What is Homoscedasticity?

500

In this situation ninety five percent of the area falls within two standard deviations of the mean.

What is a normal distribution?