EDA & Data Storytelling Pre-Test

Which visualization is most suitable for understanding the distribution (shape, spread, and potential peaks) of 'MonthlyCharges' for your customers?

• Bar Chart

• Scatter Plot

• Histogram

• Pie Chart

To quickly see the proportion of customers in each 'SubscriptionType' (Basic, Standard, Premium), which technique would you use?

• Calculating the mean of 'SubscriptionType'

• Creating a scatter plot of 'SubscriptionType' vs. 'CustomerID'.

• Generating frequency counts and proportions for 'SubscriptionType'.

• Performing a correlation analysis between 'SubscriptionType' and 'MonthlyCharges'.

What is the primary goal when performing bivariate analysis on two variables in a dataset?

• To summarize the distribution of a single variable.

• To identify the root cause of a business problem.

• To understand the relationship or association between the two variables.

• To predict a future outcome based on one variable.

You want to investigate if there's a relationship between a customer's 'MonthlyCharges' and their 'TotalUsageHours'. Which visualization type is most appropriate for this task?

• Bar Chart

• Histogram

• Pie Chart

• Scatter Plot

Which of the following best describes the ultimate purpose of Data Storytelling?

• To create aesthetically pleasing charts.

• To present raw data in a spreadsheet format.

• To communicate insights effectively to drive understanding and action.

• To perform complex statistical modeling.

To make the chart easy to interpret and highlight the best-selling category, what is a key best practice you should follow?

• Use 3D effects for visual appeal.

• Ensure the bars are sorted by their sales value (e.g., descending).

• Use at least 10 different colors for the bars.

• Start the Y-axis at a value other than zero to emphasize small differences.

What is the most accurate conclusion you can draw from the observation of a strong positive correlation between the number of ice cream sales and the number of drowning incidents in a city over several months?

• Buying ice cream causes people to drown.

• Drowning incidents cause an increase in ice cream sales.

• There is a third factor (e.g., warm weather) that likely influences both.

• The correlation indicates a direct causal link between the two variables.

If a few customers are significantly older than the rest (outliers), which measure of central tendency would best represent the 'typical' age of the majority of customers?

• Mean

• Median

• Mode

• Standard Deviation