Stuck in the Middle
This is the most frequent occurring number in the data set.
What is the mode?
The shape of normally distributed data around a mean.
What is a bell curve?
Data that is used to label variables without providing quantitative values.
What is nominal data?
A sample where everyone has an equal chance of being selected to participate in the research.
What is a random sample?
You use this analysis when you want to test whether the means between two groups are significantly different.
What is a Student’s t-test?
This is the half-way point in the data set.
What is the median?
A measure of the amount of variation or dispersion of data around a mean.
What is the standard deviation
Data where the variables have natural, ordered categories and the distances between the categories are not known.
What is the ordinal data?
This represents how far the sample mean is likely to be from the true population mean, and is sometimes called the standard deviation of the sample population.
What is the standard error?
You use this analysis when you want to measure the association between two continuous variables.
What is correlation?
This is sometimes called the “average” of a data set.
What is the mean?
68% of the data around the mean fall into this.
What is +/– 1 Standard Deviation
The two basic types of data measurement.
What are categorical and continuous?
How many people need to participate in a survey to have 95% confidence with a standard error of +/- 3%.
What is 1000?
You use this analysis when you want to test whether the means of three or more groups are significantly different.
What is ANOVA?
The reason why the mean and the median can be very different.
What is an outlier?
The percentage of data that falls outside of +/– 2 standard deviations.
What is 5%
Data measured along a numerical scale that has equal distances between adjacent values.
What is interval data?
When a sample over-represents or underrepresents a group in a population.
What is sampling bias?
You use this analysis when you are trying to predict what explanatory variables cause variation in a dependent variable.
What is Regression Analysis?
Type of graph to show frequency of distributions of numerical data. If data are normally distributed, it will look like a bell curve.
What is a histogram or density plot?
A score that indicates how many standard deviations a value is above or below the mean.
What is a z-score
Data that measures variables with an equal distance between adjacent values and has a true zero.
What is a histogram or density plot?
Another way results could be biased besides lack of accurate representation of the population.
What is question or response bias?
You use this analysis to determine whether the categorical data (frequencies) between three or more groups is significantly different.
What is a Chi Square?