Data Analytics vs Data Mining Quiz
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Questions and Answers

What is the main focus of Data Analytics according to the text?

  • Analyzing external and internal business operations
  • Building and creating crude hypotheses
  • Catering data collection and deriving essential insights
  • Deriving meaningful insights from raw data (correct)

What is the primary task of Data Mining as described in the text?

  • Building and creating models based on data
  • Deriving crude but essential insights from data (correct)
  • Making the data being used more usable
  • Analyzing data insights from business operations

Which 'V' is primarily concerned with data quality, accuracy, and availability in Big Data Architecture?

  • Volume
  • Variety
  • Veracity (correct)
  • Velocity

What distinguishes Small Data from Big Data according to the text?

<p>A dataset whose volume allows processing by a small organization (D)</p> Signup and view all the answers

In the context of Data Analytics, what does 'consolidating multiple sources' refer to?

<p>Creating a centralized data hub (B)</p> Signup and view all the answers

What is highlighted as one of the most crucial aspects for successful Data Analytics according to the text?

<p>The quality of collected data (C)</p> Signup and view all the answers

What is the key principle behind the A priori algorithm?

<p>If an itemset is frequent, all of its subsets must also be frequent (B)</p> Signup and view all the answers

What is the purpose of step 1 in the Frequent Pattern Mining Algorithm?

<p>Find frequent itemsets based on a minimum support threshold (C)</p> Signup and view all the answers

Based on the theorem provided in the text, what can be concluded about the support for subsets and supersets of an itemset?

<p>The support for an itemset never exceeds the support for its subset (A)</p> Signup and view all the answers

What is the primary function of support-based pruning in frequent itemset generation?

<p>To reduce the search space based on the support threshold (D)</p> Signup and view all the answers

Why is it important to apply step 2 (Rule generation) after step 1 (Frequent itemset generation) in the algorithm?

<p>To improve the efficiency of finding strong rules (A)</p> Signup and view all the answers

What property ensures that trimming based on support is effective in reducing search space?

<p>Anti-monotone property (A)</p> Signup and view all the answers

What does the Dunn Index measure in clustering?

<p>Average distance between clusters (B)</p> Signup and view all the answers

What does the Corrected Rand Index measure?

<p>Similarity between two partitions (D)</p> Signup and view all the answers

What does the Silhouette coefficient measure in clustering?

<p>How well an observation is clustered (C)</p> Signup and view all the answers

What does a negative Silhouette coefficient indicate?

<p>Incorrect cluster assignment (A)</p> Signup and view all the answers

In terms of clustering validation, what do most indices combine?

<p>Compactness and separation measures (B)</p> Signup and view all the answers

How is the Silhouette width interpreted when it is close to 1?

<p>Well-clustered observations (C)</p> Signup and view all the answers

What does the coefficient of variation measure?

<p>Spread or variability of observations (D)</p> Signup and view all the answers

In data analytics, what is the purpose of computing the interquartile range?

<p>Describes spread or variability (B)</p> Signup and view all the answers

What does the Support count measure in frequent pattern mining?

<p>Number of transactions containing an itemset (A)</p> Signup and view all the answers

What is the purpose of Descriptive Statistics in data analysis?

<p>Summarize characteristics of a population or sample (C)</p> Signup and view all the answers

Which measure describes where the center of a distribution lies?

<p>Mean (B)</p> Signup and view all the answers

What is the purpose of Ratio in descriptive statistics?

<p>Expresses size comparison between measures (B)</p> Signup and view all the answers

In binary representation of transactional data, what do the rows and columns correspond to?

<p>Rows: Transactions, Columns: Items (C)</p> Signup and view all the answers

What do measures of shape like Skewness and Kurtosis describe?

<p>Symmetry and concentration around the peak (B)</p> Signup and view all the answers

What is the primary application of Frequent Pattern Mining in data analytics?

<p>Discovering interesting relationships hidden in large datasets (B)</p> Signup and view all the answers

What measure reflects the relative position of an observation in a distribution?

<p>Interquartile range (C)</p> Signup and view all the answers

What is the primary goal of a method or technique?

<p>To achieve an intended goal (D)</p> Signup and view all the answers

Which visualization technique is most suitable for representing distributions of values for attributes?

<p>Box-and-Whiskers Plot (D)</p> Signup and view all the answers

What is the main purpose of Descriptive Analytics?

<p>To summarize and understand past data (A)</p> Signup and view all the answers

Which type of visualization is typically used for nominal scales with less than six categories?

<p>Bar Chart (B)</p> Signup and view all the answers

What does a Line Chart primarily show?

<p>Trends, patterns, and forecasts (D)</p> Signup and view all the answers

Which visualization technique is suitable for comparing amounts of attributes collected over time?

<p>Bar Chart (A)</p> Signup and view all the answers

What is the cardinality related to in data visualization techniques?

<p>Uniqueness of data values in an attribute (C)</p> Signup and view all the answers

Which visualization technique is best for showing how quantitative attributes change over time?

<p>Line Chart (D)</p> Signup and view all the answers

Which visualization technique is best for displaying the distribution of values for attributes?

<p>Box-and-Whiskers Plot (D)</p> Signup and view all the answers

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