STAT 121 Test 2 Questions Verified Answers
Metacognition
Thinking about thinking
Big Picture of Statistics
1. Produce data
2. Exploratory data analysis
3. Probability
4. Inference
Quantitative Variable
Numerical value, represented by some kind of measurement
Categorical Variable
Category or label values
Exploratory Data Analysis (EDA)
How we make sense of the data by converting them from their raw form to a more informative
one
What is the purpose of statistics?
To convert data into useful information
What does "population" refer to?
The group we want to study or learn something about
What is the final step in the Big Picture of statistics, as outlined by CMU eBook?
Inference
, Why might collecting data from a sample be preferred over collecting data from a
population?
Less expensive.
Less time consuming.
Collecting data from the entire population may be impossible.
True or False: Statistical information is never misleading or misrepresented.
False
True or False: All statistical summaries and conclusions should be reported in context.
True
The shape of a graph only applies to
Quantitative data
Which graph is the best choice for categorical data?
Bar Graph
Which graph is the best choice for quantitative data?
Histogram
Graphs used to display quantitative data
Histogram, Stem Plot, Box Plot, Dot Plot
Graphs used to display categorical data
Bar Graph and Pie Chart
What type of data is a Scatter Plot used to display?
2 Variable Quantative
What type of data is a Two-Way Table used to display?
Metacognition
Thinking about thinking
Big Picture of Statistics
1. Produce data
2. Exploratory data analysis
3. Probability
4. Inference
Quantitative Variable
Numerical value, represented by some kind of measurement
Categorical Variable
Category or label values
Exploratory Data Analysis (EDA)
How we make sense of the data by converting them from their raw form to a more informative
one
What is the purpose of statistics?
To convert data into useful information
What does "population" refer to?
The group we want to study or learn something about
What is the final step in the Big Picture of statistics, as outlined by CMU eBook?
Inference
, Why might collecting data from a sample be preferred over collecting data from a
population?
Less expensive.
Less time consuming.
Collecting data from the entire population may be impossible.
True or False: Statistical information is never misleading or misrepresented.
False
True or False: All statistical summaries and conclusions should be reported in context.
True
The shape of a graph only applies to
Quantitative data
Which graph is the best choice for categorical data?
Bar Graph
Which graph is the best choice for quantitative data?
Histogram
Graphs used to display quantitative data
Histogram, Stem Plot, Box Plot, Dot Plot
Graphs used to display categorical data
Bar Graph and Pie Chart
What type of data is a Scatter Plot used to display?
2 Variable Quantative
What type of data is a Two-Way Table used to display?
