The Daily Closing Values of the Dow Jones Industrial Average

The daily closing values of the Dow Jones Industrial Average are examples of

A) cross-sectional data
B) discrete data
C) time-series data
D) continuous data
Below you will find summary measures on starting salaries for classroom teachers across the United States.You will also find a list of selected states and their average starting teacher salary.All values are in thousands of dollars.
Starting salaries for classroom teachers across the United States
$$\begin{array} { | l l | } \hline & \text { Salary } \\\hline \text { Count } & 51.000 \\\text { Mean } & 35.890 \\\text { Median } & 35.000 \\\text { Standard deviation } & 6.226 \\\text { Minimum } & 26.300 \\\text { Maximum } & 50.300 \\\text { Variance } & 38.763 \\\text { First quartile } & 31.550 \\\text { Third quartile } & 40.050 \\\hline\end{array}$$
Selected states and their average starting teacher
$$\begin{array} { | l l | } \hline \text { State } & \text { Salary } \\\hline \text { Alabama } & 31.3 \\\text { Colorado } & 35.4 \\\text { Connecticut } & 50.3 \\\text { Delaware } & 40.5 \\\text { Nebraska } & 31.5 \\\text { Nevada } & 36.2 \\\text { New Hampshire } & 35.8 \\\text { New Jersey } & 47.9 \\\text { New Mexico } & 29.6 \\\text { South Carolina } & 31.6 \\\text { South Dakota } & 26.3 \\\text { Tennessee } & 33.1 \\\text { Texas } & 32.0 \\\text { Utah } & 30.6 \\\text { Vermont } & 36.3 \\\text { Virginia } & 35.0 \\\text { Wyoming } & 31.6 \\\hline\end{array}$$