Module 1 Practice Questions (2)

Front

What is a boxplot?

Back

A boxplot is a graphical representation of a dataset that displays its minimum, first quartile, median, third quartile, and maximum values, helping to visualize the distribution and identify outliers.

Front

What does the interquartile range (IQR) represent in a boxplot?

Back

The interquartile range (IQR) represents the range of the middle 50% of the data, calculated as the difference between the first quartile (Q1) and the third quartile (Q3).

Front

How do you interpret the median in a boxplot?

Back

The median is the line inside the box of a boxplot, representing the middle value of the dataset when it is ordered.

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

What is the purpose of using histograms in data analysis?

Back

Histograms are used to visualize the distribution of data, identify patterns, and detect outliers.

Front

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

Back

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

Front

What does it mean if a histogram is uniform?

Back

A uniform histogram indicates that all data points are distributed evenly across the range, with no peaks or valleys.

Front

What is the significance of the mode in a dataset?

Back

The mode is the value that appears most frequently in a dataset, indicating the most common observation.

Front

How can you determine the shape of a distribution from a histogram?

Back

The shape of a distribution can be determined by observing the peaks, symmetry, and tails of the histogram.

Front

What is the difference between qualitative and quantitative data?

Back

Qualitative data describes characteristics or categories (e.g., colors, names), while quantitative data represents numerical values that can be measured (e.g., height, weight).