One-Variable Statistics

What is a numerical variable?

• A variable that can be measured or described with numbers

• A variable that can be described in terms of categories or qualities

• A variable that cannot be measured or described with numbers

• A variable that has a single answer and no variation

What is a data point?

• A specific observation or value of a variable

• A summary statistic that describes the center of a data set

• A summary statistic that describes the spread of a data set

• A question that can be answered by collected data

What is a measure of center?

• A summary statistic that describes the typical or middle value in a data set

• A summary statistic that describes how spread out the data is

• The smallest value in a data set

• The largest value in a data set

What is the median?

• The middle value in a data set, when data is arranged from least to greatest

• The average of all the data values

• The distance between the first quartile and the third quartile

• The median of the first half of the data set

What is a measure of spread?

• A summary statistic that describes how spread out the data is

• A summary statistic that describes the typical or middle value in a data set

• The smallest value in a data set

• The largest value in a data set

What is the interquartile range?

• The distance between the first quartile and the third quartile

• The middle value in a data set, when data is arranged from least to greatest

• The average of all the data values

• The median of the first half of the data set

What is an outlier?

• A data value that is significantly different than the rest of the data set

• A summary statistic that describes the center of a data set

• A summary statistic that describes the spread of a data set

• A question that can be answered by collected data

What does a symmetric distribution indicate?

• The right and left sides of the distribution are approximately mirror images of each other

• An asymmetrical but generally bell-shaped distribution

• The mode lies off to one side and the mean is typically not equal to the median

• The data points are spread out and not clustered

What is a box plot?

• A graphic way of showing a summary of data using the median, quartiles, and extremes of the data

• A graphical display of data using dots on a number line

• A graph of vertical bars representing the frequency distribution of a set of data

• A summary statistic that describes the typical or middle value in a data set

What is the mean?

• The mean is the highest value in a set of numbers.
• The mean is the lowest value in a set of numbers.
• The mean is the middle value in a set of numbers.
• The mean is the average value of a set of numbers.