WorksheetsU1S2 Exam: Visualizing Data
Total questions: 20
Worksheet time: 20mins
Frequency means:
The number of times an outcome occurs.
The outcome of something.
A number given in hertz for statistical purposes.
The number of times an outcome occurs, that we always graph on the x-axis.
To find the range of values:
Subtract the minimum value from the maximum value for the data set.
Subtract the maximum value from the minimum value for the data set.
Find the difference of the values in the data set.
Add the minimum and maximum values for the data set.
Is range one way to measure the data's variability?
Yes
No
Maybe
Not Sure
A distribution tells us what two things:
The values of the variables and the frequency of the values.
The variables and the plots of them.
The values and the frequency of the values.
The best plot to view the values of the variables and their frequency.
Which is NOT synonymous with a distribution’s typical value:
normal
median
regular
unnatural
average
Is the concept of center MORE useful for numerical or categorical variables?
Center is useful for numerical variables.
Center is useful for categorical variables
Center is useful for neither type of variables.
Center is useful for both types of variables.
Defining the center of a distribution depends on?
The shape and spread of the data.
The density of the data.
The placement of the variables along the xy axis.
The typical middle observable value.
An algorithm is?
Precise instructions for any process.
A formula to follow in order to get the different results each time.
How we communicate with each other.
An input and output producing machine.
A histogram:
Shows the frequency of all the values that fall in a certain range, called a bin.
Shows the values that fall in a bin.
Is made up of interval sizes called bins, that we use to build plots.
Shows the frequency and bins of data that can be plotted as a bar graph.
The typical scores for the computer exam are:
81-90
91-100
71-80
85
Is the plot unimodal, bimodal, neither, or both?
More bimodal than unimodal.
Neither
Both equally.
More unimodal than bimodal.
Identifying the shape of a histogram is part of what step in the Data Cycle?
Interpret Data
Pose Questions
Analyze Data
Consider Data
We use specific terminology when discussing the shapes of distributions. Which contains the correct terms?
symmetric, right-skewed, left-skewed, unimodal, bimodal,
symmetric, skewed unimodal, bimodal, triskewed
asymmetric, right-skewed, left-skewed, bimodel,
symmetric, right-skewed, left-skewed, unimodal, bimodal, tricycle
Which is which in skewness?
right-skewed, left-skewed,
left-skewed, right-skewed,
left-hand, right-hand
No skewness happening
Which is which in skewness?
right-skewed, left-skewed
left-skewed, right-skewed
right-screw, left-screw
No skewness shown
Determine what a corresponding histogram might look like for: The grades on a very difficult test?
Right-skewed, unimodal
Left-skewed, unimodal
Right-skewed, bimodal
Left-skewed, trimodal
Determine what a corresponding histogram might look like: The heights of students in your high school.
symmetric, bimodal
symmetric, unimodal
trimodal
asymmetric, unimodal
What is to facet in R?
The process that splits the plot window in several small parts and displays a similar plot in each section.
The process that splits window in several small displays.
The code that splits the plot window so each can be grouped similarly.
The same process as grouping in R.
Important panes, or rectangular areas, of the RStudio interface that we use often are:
Console,
RMarkdown Document,
Environment, Viewer
Console,
Terminal,
Tutorial, Connections
Debug,
Build,
Viewer, File
Terminal,
Tutorial, Connections, Help
How do we quickly access the number of observations (values) of a specific variable:
Use the tally function
Use the count function
Use the View function
Use the dim function
Use the number function
