Types of Data
Data that is represented through non-numeric forms
What is qualitative?
Characteristics of a dataset that can be manipulated and have assigned values
What is a variable?
What is the mode?
Distance between a single observation and its mean
What is deviation?
Data that is grouped in categories and can be represented with numbers but is not inherently quantitative
What is categorical data?
Smaller piece of population that researchers use to draw conclusions
What is a sample?
Modal distribution with more than two peaks
What is a multi-modal distribution?
Measure of variability that is calculated by taking the square root of the variance
What is standard deviation?
Data that exists within an interval, can be represented with values containing percentages or decimals, and is often described by saying "the amount of"
What is continuous data?
The variable that causes change in the response variable when manipulated
What is an explanatory variable?
Distribution with a tail on the left side
What is left skewed?
σ = which measure of variability?
Population standard deviation
Data that is categorical and unordered
What is nominal?
Type of study where variables are manipulated and causal relationships are inferred
What is an experimental study?
Calculated by adding all values and dividing the sum by the total number of values (sample size)
What is the sample mean?
Calculated by subtracting Q1 from Q3
What is interquartile range?
Data that is ordered, has equal distance between data points, and has no true zero
What is interval data?
Sampling procedure that divides population into smaller groups with similar characteristics
Stratified sampling
Measure that is used when data is symmetrical and without extreme outliers
What is the mean?
Measure of central tendency that is used when data is skewed and there are extreme outliers
Median