6.2 Representing Data

• What type of chart is used for comparing categorical data, such as favorite colors?

  Bar charts
• What type of chart shows the frequency distribution of continuous data over intervals?

  Histograms
• Scatter graphs display relationships between two continuous variables.


  True
• Match the chart type with its key feature:

  Bar chart ↔️ Rectangular bars of varying heights

  Pie chart ↔️ Circular chart divided into slices

  Scatter graph ↔️ Points plotted on a coordinate plane

  Histogram ↔️ Rectangular bars showing interval counts

  Line graph ↔️ Continuous line connecting data points
• What is a scatter plot used for?

  Identifying correlations
• Pie charts are used to illustrate proportions of categorical data, often in the form of percentages
• Line graphs are used to present trends over time
• What is a pie chart used for?

  Illustrating proportional makeup
• When choosing a chart, consider the type of data you have and the insights you want to highlight.
• What insights do line graphs provide?

  Visualize trends over time
• What type of data is used in histograms?

  Frequency distribution of continuous data
• Which axis of a bar chart is labeled with categories?

  Horizontal axis
• How are proportions calculated for a pie chart?

  Divide by total sum
• A protractor is used to divide the circle into slices based on calculated angles.


  True
• After labeling the axes, the next step in creating a line graph is to plot the data points on the graph.
• Histograms are used to display the frequency distribution of continuous data.
• Histograms can help identify whether data is skewed, bimodal, or has outliers.


  True
• The frequency of a bin in a histogram represents the number of data points that fall into that interval
• Scatter graphs display relationships between two continuous variables by plotting points on a coordinate plane.


  True
• Steps to create a pie chart:

  1️⃣ Gather data

  2️⃣ Calculate proportions

  3️⃣ Determine angles

  4️⃣ Draw the circle

  5️⃣ Divide the circle
• You use a protractor to divide the circle in a pie chart.


  True
• Pie charts are effective for comparing categories relative to the whole.


  True
• Steps to create a line graph

  1️⃣ Define data

  2️⃣ Label axes

  3️⃣ Plot data points

  4️⃣ Connect the points

  5️⃣ Add a title
• What is the first step in creating a histogram?

  Bin the data
• Match the type of chart with its primary use:

  Bar chart ↔️ Comparing categorical data

  Pie chart ↔️ Illustrating proportions

  Line graph ↔️ Showing trends over time

  Histogram ↔️ Displaying frequency distribution
• Trends are typically illustrated using line graphs.


  True
• The primary goal of choosing a chart is to match the data type with the desired insights.

  True
• What kind of data is best represented by pie charts?

  Proportional data
• The choice of chart type should align with the nature of the data and the story it aims to convey.


  True
• The height of each bar in a bar chart is proportional to the value of its category.


  True
• To determine the central angle for each slice in a pie chart, multiply the proportion by 360 degrees.
• What is the central angle for a slice representing 40% in a pie chart?

  144°
• Line graphs are ideal for illustrating trends in continuous data over time.

  True
• What does "binning" data mean in the context of histograms?

  Dividing data into intervals
• Histograms help identify patterns in the data and understand the underlying distribution
• In a histogram, the bar width represents the bin width, and the bar height represents the frequency.


  True
• Line graphs are ideal for presenting trends over time.
• What is the first step in creating a pie chart?

  Gather data
• What should you add to each slice of a pie chart for clarity?

  Labels
• What is the first step in creating a line graph?

  Define data