D467 - Exploring Data Questions and Answers Already Passed
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Course
D467 - Exploring Data
Institution
D467 - Exploring Data
D467 - Exploring Data Questions and
Answers Already Passed
What type of chart is commonly used to visualize the distribution of a numerical variable?
a. Bar chart
b. Histogram
c. Pie chart
d. Line graph
Which of the following is a method for detecting outliers in a dataset?
a. Mea...
D467 - Exploring Data Questions and
Answers Already Passed
What type of chart is commonly used to visualize the distribution of a numerical variable?
a. Bar chart
✔✔b. Histogram
c. Pie chart
d. Line graph
Which of the following is a method for detecting outliers in a dataset?
a. Mean
✔✔b. Box plot
c. Mode
d. Range
What does the term "data cleaning" refer to?
a. Storing data securely
b. Removing duplicates from a dataset
✔✔c. Correcting or removing inaccurate records
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,d. Formatting data for presentation
What type of analysis focuses on the relationships between multiple variables?
✔✔a. Multivariate analysis
b. Univariate analysis
c. Bivariate analysis
d. Descriptive analysis
What is a key feature of a scatter plot?
a. It shows the frequency of categorical data
b. It displays data trends over time
✔✔c. It represents the relationship between two quantitative variables
d. It summarizes the central tendency of a dataset
Which statistical measure represents the average value of a dataset?
✔✔a. Mean
b. Median
c. Mode
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,d. Range
What does a correlation coefficient indicate?
a. The size of the dataset
✔✔b. The strength and direction of a linear relationship between two variables
c. The central tendency of data
d. The number of outliers in a dataset
Which of the following is an example of qualitative data?
a. Age of respondents
✔✔b. Eye color of participants
c. Height measurements
d. Sales figures
What is the purpose of data visualization in exploratory analysis?
a. To create data models
✔✔b. To present data in a way that highlights patterns and insights
c. To clean the dataset
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, d. To calculate statistics
What is the significance of a box plot?
✔✔a. It shows the distribution of data based on five summary statistics
b. It compares means across groups
c. It visualizes time-series data
d. It displays correlation coefficients
How can you assess the normality of a dataset?
a. By calculating the median
✔✔b. By using a Q-Q plot or Shapiro-Wilk test
c. By calculating the mean
d. By creating a histogram only
What role does data aggregation play in exploratory data analysis?
a. It visualizes raw data points
✔✔b. It summarizes data to identify trends and patterns
c. It cleans the data
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