Unit 1
Who the data is about
What are individuals?
A ___ is similar to a segmented bar graph, but it draws attention to the sizes of each group
What is a mosaic plot?
This observes individuals and measures variables of interest but does not attempt to influence the responses.
What is an observational study?
numerical values where counting makes sense.
What are discrete variables?
A _____ variable measures the outcome of a study or an observation.
What is a response variable?
Uses subjects that are readily available.
What is convenience sampling?
the equation to calculate bin width for a histogram.
what is
Highest bin - Lowest bin/ #of bins
On a scatterplot, the x value is also this variable..
What is an explanatory variable?
Randomly select an arbitrary starting point, then select every Kth member of the population.
What is systematic random sampling?
This type of graph displays percentiles.
What is a cumulative relative frequency graph?
These are the things to look for in a scatter plot:
hint- 3 things
What is DUFS?
Direction
Unusual features/ outliers
Form
Strength
Occurs when some groups in the population are left out of the process of choosing a sample.
What is undercoverage?
If x is an observation from a distribution that has known mean and standard deviation, the z score for x is:
hint- equation
Z= x-μ/ σ
The way the line is fitted to the Data is through a process called the...
What is the method of least squares?
The 4 critical elements of an experimental design.
What is Comparison, Randomization, Control, and Replication?