Quantitative scales refer to the __________.

The following chart shows the change in GDP over two years for Countries A, B, C, and D. This is an example of a __________.

A total of 822 recently purchased books were randomly selected from all recent book purchases over the Internet. The following chart shows the breakdown of book types. What percentage of books in the sample were self-help books?  

Which risk factor is most likely to increase a child’s vulnerability to psychopathology?

Aspect ratio is ratio of the __________.

The process of ensuring data are accurate and consistent through the identification and correction of errors and missing values refers to __________.

The change over time of a single variable for multiple entities by connecting pairs of data points for each entity refers to a __________.

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 observations have x2  values equal to 2?

Which values were observed and how often those values appear in the data being analyzed describes the __________.

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 _________.