DSE DSE - Data Science Data Visualization and Communication 1

Question 1

Which Python library is most commonly used for creating static statistical visualizations in data science?

Accepted Answer

Matplotlib

Answer

Matplotlib is the foundational Python plotting library widely used for static statistical charts and visualizations in data science.

Question 2

What type of chart is best suited for showing the frequency distribution of a single continuous variable?

Accepted Answer

Histogram

Answer

A histogram divides continuous data into bins and displays their frequencies, making it ideal for showing the distribution of a single continuous variable.

Question 3

Which visualization technique best shows the correlation between two continuous variables?

Accepted Answer

Scatter plot

Answer

A scatter plot places each observation as a point on a 2D plane using two continuous axes, making correlation patterns visually apparent.

Question 4

In a box plot, what do the 'whiskers' typically represent?

Accepted Answer

1.5× the interquartile range from Q1 and Q3

Answer

By default, box plot whiskers extend to 1.5 times the IQR beyond Q1 and Q3, with points beyond that considered outliers.

Question 5

Which chart type is most appropriate for comparing proportions that sum to a whole?

Accepted Answer

Pie chart

Answer

A pie chart divides a circle into slices proportional to each category's share of the total, making part-to-whole comparisons intuitive.

DSE - Data Science Practice Test

DSE - Data Science Practice Test

DSE DSE - Data Science Data Visualization and Communication 1