Exercise: Data Visualization

Part 1 Multiple-choice questions along with their answers for each type of data visualization

  • Explain the concept and importance of data visualisation.

  • Use the proper visualisation.

NoteList of chart you should known

  • Pie chart

  • Bar chart

  • Treemap

  • Histogram

  • Box plot

  • Line chart

  • Scatter plot

  • heatmap

  • Geo map (choropleth)

If there’s a chart you don’t know, you can study it on Wikipedia and ChatGPT.

  1. What is Data Visualization?

    1. The process of storing data in a database

    2. The analysis of data using statistical methods

    3. The graphical representation of data to facilitate understanding and insights

    4. The automation of data collection processes

Answer:

  1. What type of data is best represented by a bar chart?

    1. Continuous data over time

    2. Proportions of a whole

    3. Distribution of a data set

    4. Categories or groups

Answer:

  1. When should you use a pie chart?

    1. To show changes over time

    2. To compare different categories

    3. To display parts of a whole

    4. To show frequency distributions

Answer:

  1. What is a limitation of pie charts?

    1. They are ideal for showing trends over time

    2. They are difficult to read with too many slices

    3. They are effective with many categories

    4. They cannot show proportions

Answer:

  1. What is the primary use of a histogram?

    1. To compare categories

    2. To show relationships between two variables

    3. To display the distribution of a data set

    4. To show parts of a whole

Answer:

  1. What information does a boxplot provide?

    1. Trends over time

    2. Distribution of data and potential outliers

    3. Relationship between two variables

    4. Proportions of a whole

Answer:

  1. What does the line inside the box of a boxplot represent?

    1. The median

    2. The mean

    3. The mode

    4. The range

Answer:

  1. When is it appropriate to use a scatter plot?

    1. To compare parts of a whole

    2. To show the relationship between two continuous variables

    3. To display data distribution

    4. To compare categories

Answer:

  1. What is the purpose of adding a trend line to a scatter plot?

    1. To highlight parts of a whole

    2. To show the distribution of data

    3. To visualise the overall direction and strength of the relationship

    4. To compare different categories

Answer:

  1. What chart should be created to better understand the relationship between advertising dollars spent and the subsequent sales?

    1. Pie chart

    2. Clustered column (bar) chart

    3. Line chart

    4. Scatter chart

Answer:

Part 2 Answer the following questions or complete the statements by writing appropriate words or amounts in the answer blanks

Interpret the visualisation.

The following bar graph shows the number of seconds that different rides last at the fair. We can tell how long each ride lasts by matching the bar for that ride to the number it lines up with on the left.

The spinning cups are the shortest ride. They last only 120 seconds. The Ferris wheel is the longest ride. It lasts 240 seconds.

  1. How many seconds does the Spinning cups ride last?

Answer: Seconds.

  1. How many seconds does the roller coaster ride last?

Answer: Seconds.

  1. Which rides last longer than the spinning cups but not as long as the roller coaster? (Swinging Ship and Bumper cars)

Answer: Seconds.

  1. What is the shortest time either Bumper cars or Swinging Ship for the last ride?

Answer: Seconds.

  1. Arrange the ride based on time spent in ascending order. (Spinning cups, Swinging Ship, Bumper cars, Roller coaster, Ferris wheel)

Answer:

The graph shown here is a histogram. The width of each bar indicates the age intervals of about 15 years. The scale at the left indicates the number of tenants in each age interval. The length of each bar indicates how many tenants in the building fall within the specific age groups.

  1. How many tenants are there altogether living in the building? Answer: tenants.

  2. How many tenants, whose ages are less than 30 years, are there in the building? Answer: tenants.

  3. How many tenants, whose ages are less than 60 years, are there in the building? Answer: tenants.

  4. How many tenants, whose ages are at least 30 but less than 60 years, are there in the building? Answer: tenants.

  5. How many tenants, whose ages are less than 90 years but at least 60 years old, are there in the building? Answer: tenants.

The chart below represents the way a third-world government intends to spend money received on the sale of oil to the United States. (The total amount of money received is $2 billion.) Use this information to answer items 1 and 2.

  1. How much will the country spend on social services and agriculture together? Answer: million US$.

  2. How much more will be spent on industry than on the administration of states and cities? Answer: million US$.

Note: 1 million = 1,000,000.

The graph below shows that the tea price is expressed in cents per pound, which means that the value “120” is 120 cents or $1.20 per pound. Use the graph above to answer the following questions.

  1. List the years in order from least expensive to most expensive.

Answer: .

  1. Which two years showed the greatest increase in tea prices?

Answer: .

3)Which pairs of years showed tea prices rise by the same amount that tea prices fell? (1982-1983 and 1985-1986)

Answer: .