"Age at First Marriage The following time-series plot shows the average age at which individuals first marry by gender for each year of the census since 1890.

b. To the nearest year, what was the average age of a woman who first married in 1960?"

The time-series graph below gives the price (USD) of a gallon of gas each month over the course of a year. Find the time intervals during which gas prices are increasing.

Graphing Data Sets In Exercises 17–32, organize the data using the indicated type of graph. Describe any patterns.

Engineering Degrees Use a time series chart to display the data shown in the table. The data represent the number of bachelor’s degrees in engineering (in thousands) conferred in the U.S. (Source: U.S. Deapartment of Education)

What type of variable is required when drawing a time-series plot? Why do we draw time-series plots?

"Age at First Marriage The following time-series plot shows the average age at which individuals first marry by gender for each year of the census since 1890.

a. To the nearest year, what was the average age of a man who first married in 1980?"

"Age at First Marriage The following time-series plot shows the average age at which individuals first marry by gender for each year of the census since 1890.

c. In which year was the difference in the average age of men and women at which they first married the largest? Approximately, what is the age difference?

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"Age at First Marriage The following time-series plot shows the average age at which individuals first marry by gender for each year of the census since 1890.

d. In which year was the difference in the average age of men and women at which they first married the least?"

Which of the following charts provides a useful means for displaying data over time?

$$A time series graph is useful for which of the following purposes?