Chapter 1
The type of variable that contains numerical values and where arithmetic operations make sense
What is a quantitative variable
The alternative way of explaining the mean/average in ANY distributions
What is x bar (x̄)
A curve that describes an overall shape/pattern of a distribution
What is a density curve
A graph that represents the relationship between two quantitative variables
What is a scatterplot
To make a pie chart, your data has to equal approximately ___%
What is 100%
The measure of the center that is NOT resistant to outliers
What is the mean
What is a normal distribution
What is an explanatory variable
These two graphs are used to measure quantitative variables
What is a stemplot and histogram
In a left-skewed distribution, where would the mean lie in relation to the mean
What is less than the median
The area from μ + 2σ and μ - 2σ represents ___% of a normal distribution
What is 95%
A straight line that explains the overall shape of a scatterplot (when the pattern tends to be linear)
What is a regression line
A distribution where the tail extends on the right longer than the left
What is a right-skewed distribution
The measure of variability that uses the median as the measure of center
What is the five-number summary
The standardized value of an observation within a data set
What is a z-score
r² near 0 implies what type of relationship between two quantitative variables
What is a weak relationship
This is where possible values are distributed in different intervals on a histogram
What is a class
The measure of variability that explains how far an observation is from the mean
What is standard deviation
In a standardized normal distribution, finding the z-score can help you find correlating ___
What is a proportion
Something that describes the correlation between two quantitative variables that are not included in the study
What is a lurking variable