Exam 3: Visual Displays of Data

If two variables are not related linearly, than they must be related nonlinearly.

A private high school wants to show that students' test scores are superior to those of another school in the district.The administration creates a bar graph showing a very tall bar representing the private school's mean test score and a very short bar representing the mean score for the other school.What part of the graph would show if the private school is exaggerating the difference between schools?

Use the following to answer questions This figure depicts the typical relation found between a person's age (in years) and his or her reaction time in a simple reaction time task (e.g., time to press a button when a light turns green). Figure: Age and Reaction Time -(Figure: Age and Reaction Time) Which statement best captures what the graph depicts?

The cutesy images used to represent data in pictorial graphs could be considered an example of:

Tori wants to graph the relation between number of hours spent studying and type of major (pre-med, pre-law, and the sciences).What should be listed on the y-axis?

Bar graphs are highly informative, but they can also be deceiving because what seems to be a significant difference in means may actually be a small difference.What part of the graph reveals whether a difference in means is exaggerated?

Why are pictorial graphs typically used only in popular magazines, not in scientific journals?

On a histogram the x-axis depicts the values of a scale variable, while on a bar graph the x-axis depicts the values of _____ variable.

Use the following to answer questions Figure: Class Rank -(Figure: Class Rank) Given the construction of this graph, what is the dependent variable?

Popular magazines and Internet sources often use _____ to display information, which tend to confuse rather than clarify information.

An inaccurate values lie tells the truth in one part of the data but visually distorts it in another place.

Which of these would be appropriate to depict on a time series plot?

Use the following to answer questions This figure depicts the results of a study by Ahluwalia et al.(2006) investigating the effects of two types of gum (placebo or nicotine) and two types of counseling (educational or motivational) in helping people to stop smoking. Figure: Smoking Cessation -(Figure: Smoking Cessation) Which Figure, A or B, would be the best figure to use when presenting the results of this study and why?

_____ are an efficient way to visually display data to identify whether there is a linear or nonlinear relation between scale variables.

Use the following to answer questions Figure: Class Rank -(Figure: Class Rank) From this graph, one knows with certainty that a person with a class rank of 60 in the freshman year would have a class rank of 60 in his or her senior year.This statement is an example of a(n) _____ lie.

When creating a bar graph, the pattern that fills in each bar is a type of moiré vibration.

A type of line graph used to depict changes in a dependent variable over time is a:

Scatterplots are often used to assess what type of pattern the data create.For example, when the data form a pattern that flows downward and toward the right, this is considered to be a(n):

Kurt is presenting data on how often owners give treats to their pets.He uses pictures of fish for cat treats and pictures of bones for dog treats in a graph of the data.Although this graph may look interesting, why should Kurt consider using a different type of graph?

A bar graph summarizing the height of buildings in a major city depicts the bars as three-dimensional skyscrapers.The appearances of the bars qualify as which type of chartjunk?