4
Artificial Intelligence
Unit 4: Statistical Data
255+ practice questions available
Sample Practice Questions
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1
easy
What is a dataset?
AA single data point
BA collection of related data organized for analysis
CA database management system
DA type of programming language
2
easy
What is data privacy?
AThe process of deleting all data after use
BThe right of individuals to control how their personal information is collected and used
CStoring data in encrypted format only
DSharing data openly with everyone
3
medium
What is the purpose of ANOVA (Analysis of Variance)?
ATo compare means of exactly two groups
BTo compare means across three or more groups simultaneously
CTo measure correlation between variables
DTo test whether data is normally distributed
4
medium
What does the Variance Inflation Factor (VIF) measure?
AThe variance explained by a model
BHow much a feature's variance is inflated due to correlation with other features, indicating multicollinearity
CThe total variance of a dataset
DHow much variance is removed after PCA
5
medium
What is 'support' in association rule mining?
AThe probability that item B is purchased given item A is purchased
BThe fraction of all transactions that contain a given itemset
CHow much more often A and B appear together than expected by chance
DThe total number of distinct items in the dataset
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