Flashcard U1 L1-L5

Front

What is a histogram?

Back

A histogram is a graphical representation of the distribution of numerical data, showing the frequency of data points within specified ranges (bins).

Front

How do you find the median in a data set?

Back

To find the median, arrange the data points in ascending order and identify the middle value. If there is an even number of data points, the median is the average of the two middle values.

Front

What does the term 'interval' mean in statistics?

Back

An interval in statistics refers to a range of values that data points can fall into, often used in histograms to group data.

Front

What is the significance of the median in a data set?

Back

The median is a measure of central tendency that represents the middle value of a data set, providing insight into the distribution of the data.

Front

What is the difference between mean and median?

Back

The mean is the average of all data points, while the median is the middle value when data points are arranged in order. The median is less affected by outliers.

Front

How do you interpret the height of bars in a histogram?

Back

The height of each bar in a histogram represents the frequency of data points within the corresponding interval.

Front

What is the purpose of using intervals in a histogram?

Back

Intervals are used in histograms to group data points into ranges, making it easier to visualize and analyze the distribution of the data.

Front

What does it mean if a histogram is skewed to the right?

Back

A right-skewed histogram indicates that the majority of data points are concentrated on the left side, with a few larger values extending to the right.

Front

What is the role of the x-axis in a histogram?

Back

The x-axis in a histogram represents the intervals or bins of data, showing the range of values for the data set.

Front

What is the role of the y-axis in a histogram?

Back

The y-axis in a histogram represents the frequency of data points within each interval.