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Which of these is the amount of gray in a color and determines the intensity or purity of the hue in the color?

The following visualizations are an example of a __________.

Which of the following divides quantitative measurements into classes and graphs the frequency, relative frequency, or percent frequency for each class?

If there are a relatively small number of observations with missing values, discarding the observations with missing values may be a good choice if a variable has observations for which the missing values are _________.

The accompanying data set contains two variables: x1 and x2. Observation x 1 x 2 1 0.46 4 2 0.41 1 3 0.96 4 4 0.48 2 5 0.79 3 6 0.7 0 2 7 0.14 3 8 3 9 0.49 3 10 0.84 2 11 0.9 0 3 12 0.04 1 13 0.19 3 14 0.06 2 15 0.23 2 ​ How many missing x1 observations are there?

What does the red arrow indicate in the following box plot displaying the distribution of exam scores?  

(1:15 to 2:33)

In a negative relationship, __________.

The property of an object that results from the way the object reflects or emits light is __________.

Examining one column of a data set and focusing on the distribution of a variable’s values is called __________.