digital anal Flashcards
What is data analytics?
The process of analyzing data to make decisions
Why is data analytics important for businesses?
All of the above
Which of these is an example of structured data?
Customer database with names and phone numbers
What is descriptive analytics?
Analytics that explains what has happened
Which type of analytics predicts future outcomes based on data?
Predictive analytics
Big Data refers to datasets that are…
Too large and complex for traditional data-processing methods
Which of the following describes prescriptive analytics?
Recommends actions based on data analysis
What type of data visualization is best suited for showing parts of a whole?
Pie chart
What is the purpose of A/B testing in data analytics?
To compare two versions of a product or feature to determine which performs better
To compare two versions of a product or feature to determine which performs better
What type of data is “Gender” in a dataset?
Qualitative
What is the significance of data governance in analytics?
To ensure data privacy, security, and compliance
What is the first step in the data analytics process?
Data Collection
Which of the following is a type of data analytics?
D
A) Predictive Analytics
B) Descriptive Analytics
C) Prescriptive Analytics
D) All of the above
Which chart is most commonly used to show trends over time?
Line Chart
In data cleaning, which process removes duplicate values in a dataset?
Normalization
Which of the following is NOT a form of data visualization?
Base Graph
Which chart is best suited for showing the distribution of data across different categories?
Bar chart
When creating a histogram, the X-axis represents:
Data values or ranges
In a histogram, what does the height of each bar represent?
The frequency or count of data in a specific range
If the bars in a histogram are skewed to the right, what does this indicate about the distribution of the data?
Positively skewed distribution
When would the median be a better measure of central tendency than the mean?
When data has outliers or is skewed
Which measure of central tendency is most affected by outliers?
Mean
The median is defined as:
The middle value when data is ordered
In a dataset where the mean is greater than the median, what can you infer about the shape of the distribution?
It is positively skewed (right-skewed)
When analyzing income data, which measure of central tendency is typically preferred and why?
Median, because it is less influenced by extreme outliers
What does the mean of a dataset represent?
The average of all data points
Which measure of central tendency divides the dataset into two equal parts?
Median
In a dataset with outliers, why might the median be a better measure of central tendency than the mean?
The mean is distorted by extreme values, while the median is not
If the mean and median of a dataset are equal, what type of distribution does the data likely have?
Relatively Symmetric
Why are measures of central tendency important for summarizing large datasets?
They reduce the complexity of data by providing a single representative value
