Sampling Methods
A random selection method where everyone in the population has an equal chance of being chosen
What is Simple Random Sampling?
A number describing a sample
What is a statistic?
Command to access and edit data
What is "Stat -> Edit"?
A graph that visualizes qualitative/categorical data using rectangles whose heights are proportional to the number of observations within each category
What is a bar chart?
What is The Empirical Rule?
A means of sampling where you invite others to respond to your survey.
What is Voluntary Response Sampling?
A number describing a population
What is a parameter?
The command to compute a least-squares regression line
What is LinReg(ax+b)/LinReg(a+bx)?
A graph that visualizes a five number summary
What is a boxplot?
A ____ of a data value measures how many standard deviations away that value is from the mean.
What is a z-score?
A sampling method where your population is split into groups, and simple random sampling is performed in each group before pooling the results
What is stratified random sampling?
A variable that categorizes something (e.g., color of a car, favorite ice cream flavor)
What is a qualitative variable?
The command to produce a five number summary, in addition to the mean and standard deviation of the data
What is 1-VarStats?
A ____ distribution graph has a long, thin tail on the left side, with the majority of data clustered to the right. The mean is less than the median.
What is left-skewed?
A division of data into four equally-sized pieces.
What are quartiles?
A sampling method where the population is split into similar heterogeneous groups, then one or few of these are randomly selected and a census is performed within each of them.
What is cluster sampling?
A variable that measures how many/how much of something there is
What is a quantitative variable?
The output Sx measures the spread of a ____
What is a sample?
A distribution with a peak at the center
What is bell-shaped?
A measure of the strength of the linear relationship between two variables
What is the correlation coefficient?
In _______ we simply include the individuals who are convenient
What is convenience sampling?
A statistic that is not impacted by outliers much (examples include median and IQR).
What is a resistant statistic?
The command string to enable viewing the correlation coefficient after computing a regression line
What is Mode --> StatDiagnostics ON?
A plot of two sets of data as an ordered pair
What is a scatterplot?
This value in the linear regression equation measures the rate at which the predicted value y_hat changes relative to the independent variable x
What is slope?