4th test quiz Flashcards | StudBud

4th test quiz

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Questions 30

Answers

1
What is used to plot a correlation matrix?
Line plot
Bar plot
Heatmap
Boxplot
2
Which plot shows outliers?
Area chart
Box plot
Line plot
Pie chart
3
Which algorithm is for clustering?
XGBoost
Logistic Regression
KMeans
SVM
4
Which method removes missing rows in Pandas?
dropna()
fillna()
interpolate()
replace()
5
What’s the default axis in df.drop()?
Both
0 (rows)
1 (columns)
None
6
What is Pandas Profiling used for?
Data report
Data transformation
Filtering
Cleaning
7
What metric evaluates regression?
MSE
F1 score
Recall
Accuracyl
8
What does .describe() show?
Summary stats
Column names
Data types
Correlation
9
What is unsupervised learning?
Uses target
Supervised training
Has labels
No labels
10
Which is a classification algorithm?
PCA
Decision Tree
KMeans
Linear Regression
11
What does .info() display?
Graph
Stats
Metadata
Summary
12
Which chart is best for distribution?
Histogram
Scatter
Line
Bar
13
What’s Tableau used for?
Web development
Data collection
Data visualization
ML
14
Which regression algorithm is linear?
KNN
Naive Bayes
Decision Tree
Linear Regression
15
What does .fillna() do in Pandas?
Replaces data
Drops nulls
Finds nulls
Fills nulls
16
What’s the use of .corr()?
Replace values
Show correlation
Remove columns
Sort data
17
What function changes data type in Pandas?
convert()
typecast()
cast()
astype()
18
What does K in KNN stand for?
Knowledge
Number of neighbors
Kernel
Key features
19
What is the main output of clustering?
Data types
Predictions
Clusters
Categories
20
What does .duplicated() return?
Missing data
Null count
Unique rows
Boolean mask
21
Which command runs Pandas profiling?
df.profile()
ProfileReport(df)
report(df)
profile.generate()
22
What is clustering used for?
Regression
Grouping unlabeled data
Classification
Normalization
23
Which method gives frequency of categories?
unique()
mode()
count()
value_counts()
24
What’s the target in regression?
Continuous value
Category
Text
Integer
25
Which Tableau field is aggregated by default?
Numeric
Boolean
String
Date
26
What does a scatter plot show?
Frequency
Mean values
Relationship
Time series
27
What’s the goal of classification?
Predict value
Classify into categories
Count records
Group by clusters
28
What is the purpose of data cleaning?
Remove inconsistencies
Introduce errors
Create duplicates
Add noise
29
Which metric is NOT for classification?
RMSE
Recall
F1 Score
Precision
30
In Tableau, what does “Show Me” do?
Export views
Filter data
Clean data
Suggest charts