Line Graphs & Measures of Center

Front

What is a line graph?

Back

A line graph is a type of chart that displays information as a series of data points called 'markers' connected by straight line segments. It is used to visualize data trends over time.

Front

What does the term 'mean' refer to in statistics?

Back

The mean is the average of a set of numbers, calculated by adding all the numbers together and dividing by the count of numbers.

Front

How do you find the mode of a data set?

Back

The mode is the number that appears most frequently in a data set.

Front

What is the median in a data set?

Back

The median is the middle number in a sorted list of numbers. If there is an even number of observations, the median is the average of the two middle numbers.

Front

What is the range of a data set?

Back

The range is the difference between the highest and lowest values in a data set.

Front

How can you interpret a line graph?

Back

To interpret a line graph, observe the trends shown by the lines, noting increases, decreases, and any patterns over the time intervals represented.

Front

What is the purpose of using measures of center?

Back

Measures of center (mean, median, mode) summarize a set of data points to provide a central value that represents the data.

Front

If the data set is 5, 0, 9, 9, 3, 0, 5, 5, 4, what is the mode?

Back

The mode is 5, as it appears most frequently in the data set.

Front

What is the difference between mean and median?

Back

The mean is the average of all values, while the median is the middle value when the data is ordered.

Front

How do you calculate the mean of the numbers 2, 4, 6, 8?

Back

Add the numbers (2 + 4 + 6 + 8 = 20) and divide by the count of numbers (20 / 4 = 5). The mean is 5.