34 Questions
What is the purpose of unstructured/textual data?
To be processed by humans
Which type of data includes XML, HTML, and log files?
Semi-structured data
What is the singular form of the word 'data'?
Datum
Which type of data is targeted for computers to process?
Numeric data
What is the purpose of structured data?
To be processed by computers
Which category of data includes facts and can be either numeric or nominal?
Structured data
What is the arithmetic mean of the given data set: {21,23,23,26,26,27,29,30,32}?
26.33
What is the measure of dispersion used to calculate how far each number in the set is from the mean?
Variance
What does the standard deviation provide a measure of?
The spread of the numbers in relation to the mean
Which measure of centrality tendency is considered as the number in the middle of a data set when arranged in ascending order?
Median
What is the measure of dispersion that calculates the difference between the maximum and minimum values in a data set?
Range
Which measure provides a measure of the asymmetry of the probability distribution of a real-valued random variable about its mean?
Skewness
What does the Mean Absolute Deviation (MAD) calculate?
Average absolute deviation from the mean
What type of plot is considered versatile and informative for visualizing quartiles and outliers?
Box-and-Whiskers Plot
What type of chart is used to represent the frequency of values in a data set?
Histogram
What does skewness measure in a probability distribution?
Asymmetry about its mean
When calculating variance, what does (xi−x‾)2 represent?
Sum of squared differences from the mean
What is used to visualize how data is distributed across quartiles and identify outliers?
Box-and-Whiskers Plot
What type of data is targeted for humans to process/digest?
Unstructured/textual data
What is the measure of dispersion used to calculate how far each number in the set is from the mean?
Standard Deviation
What does skewness measure in a probability distribution?
Asymmetry
What does the standard deviation provide a measure of?
Dispersion
Which category of data includes facts and can be either numeric or nominal?
Structured data
What type of plot is considered versatile and informative for visualizing quartiles and outliers?
Box plot
What is the purpose of descriptive statistics?
To characterize and interpret data as it is
What does the range measure in a data set?
The difference between the maximum and minimum values
What does the variance measure in a data set?
How far each number in the set is from the mean
What does the standard deviation provide a measure of?
The spread of the numbers in relation to the mean
Which measure is considered as the number in the middle of a data set when arranged in ascending order?
Median
What type of chart is considered versatile and informative for visualizing quartiles and outliers?
Box-and-Whiskers Plot
What does skewness measure in a probability distribution?
The asymmetry of the probability distribution about its mean
What is used to visualize how data is distributed across quartiles and identify outliers?
Box-and-Whiskers Plot
What type of chart represents the frequency of values in a data set?
Histogram
What is another name for the Mean Absolute Deviation (MAD)?
Absolute Deviation
Test your knowledge of Chapter 3 'Nature of Data, Statistical Modelling and Visualization' from the book 'Analytics, Data Science and AI: Systems for Decision Support Eleventh Edition, Global Edition'. The quiz may include questions about data nature, statistical modeling, visualization, and using POWER BI. JAWS users may also find questions related to accessing hyperlinks and content navigation.
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