Quiz 2

Based on the following website, which airline shaves off the most time when flying from DFW to New York (JFK)? American Virgin United Delta Frontier Alaska

Virgin

Choose all that apply. Which statement(s) are true about the box plots shown below? Consumer, Corporate and Home Office segments all have outliers. Home Office has the lowest median value. Corporate has the largest spread. Home Office has the smallest IQR

- Consumer, Corporate and Home Office segments all have outliers. - Corporate has the largest spread - Home Office has the smallest IQR

According to the visualization called "200 Years of Immigration to the U.S." from Examples of Inspiring Data Visualizations, prior to the 1930s most immigrants came from Europe , while after 1960 most immigrants came from Mexico, Latin America, & Asia .

- Europe - Mexico, Latin America, & Asia

Choose all that apply. Which would be reasonable improvements to the following visualization? Include a clearer and more descriptive title Change years to months Remove excessive labeling of data points Display counts instead of percent

- Include a clearer and more descriptive title - Remove excessive labeling of data points

Select all that apply. Which of the following could introduce bias into the data-gathering process, data which is then used to create a visualization? Slanted survey questions, such as "What problems did you have using this software?" Choosing a random sample of the population you want to depict Trying to gauge public opinion on the economy, but only including homeowners in the survey Measuring the weight of study participants but recalibrating the scale in the middle of data-gathering

- Slanted survey questions, such as "What problems did you have using this software?" - Trying to gauge public opinion on the economy, but only including homeowners in the survey - Measuring the weight of study participants but recalibrating the scale in the middle of data-gathering

What's wrong with this line chart? Choose all that apply. There are too many lines on one chart Line charts are not appropriate to show things over time There is little contextual information (for example, there is no title and the x-axis is not labeled)

- There are too many lines on one chart - There is a little contextual information (for example, there is no title and the x-axis is not labeled)

Choose all that apply. We use tables when ________. We want to compare individual values We want to find relationships among whole sets of values We need precise values We want both detail and summary We have quantitative values with more than one unit of measure Our story is shown with patterns or trends in the data

- We want to compare individual values - We need precise values - We want both detail and summary - We have quantitative values with more than one unit of measure

Which chart type would be the best choice to use as a redesign of this pie chart? A bullet graph A bar chart A box plot showing the distribution by company A line chart showing Company B has the highest percent

A bar chart

Which of the charts below is the best way to show profit over time? A line chart going from left to right, with the most recent date on the right. A line chart going from right to left, with the most recent date on the left. A bar chart with the most recent date at the bottom. A bar chart with the most recent date at the top.

A line chart going from left to right, with the most recent date on the right.

A.S.K., which stands for Accurate; Story; Knowledge , is an acronym used to evaluate data visualizations.

Accurate; Story; Knowledge

Review the newborn health data set. When we use this data in Tableau, Tableau will recognize the Health Problems variable as a ___________. Dimension Measure Number

Dimension

According to Stephen Few's blogpost "Why Do We Visualize Quantitative Data," we visualize data to perform three fundamental tasks in an effort to achieve three essential goals. Match the tasks to their goals. Exploration ____________ Sense making ____________ Communication ___________

Exploration - Discovery Sensemaking - Understanding Communication _ Informed Decisions

Match the appropriate components of a Box Plot

F - Minimum D - Median C - Upper Quartile A - Maximum B - Maximum value, excluding outliers

According to Stephen Few's blogpost "Why Do We Visualize Quantitative Data," the best data visualizers are those who have been trained in graph arts. True False

False

What is true about multiple stacked bars? It's difficult to compare each segment across dimensions or categories since there's no common baseline (except for the first category) They are appropriate when there are many categories There's always plenty of space to label all bar segments if necessary Small multiple bar charts are always a better alternative

It's difficult to compare each segment across dimensions or categories since there's no common baseline (except for the first category)

Review the newborn health data set. When we use this data in Tableau, Tableau will recognize the Mother's Age variable as ___________. Dimension Measure Category

Meausure

What's wrong with this pie chart? The pie chart sections do not add up to 100% It uses the color blue, and you should never use the color blue in infographics Nothing

The pie chart sections do not add up to 100%

Alberto Cairo says that data visualizations take advantage of the fact that humans are a visual species whose brains are good at discerning patterns. True False

True

Line graphs do not need to start at zero because they encode data by position or slope. True False

True

Pie charts are often inappropriate because it is difficult for us to quantitatively perceive and compare size or width. True False

True

Pie charts can be appropriate on maps because other options to present part to whole relationships are not available on a map.

True

Visualizations are effective when words cannot get the point across better. True False

True