question 4

Which of the following are examples of positive correlation?

• Increased studying and higher grades

• Higher temperatures and increased ice cream sales

• Higher unemployment and increased spending

• More physical activity and improved health

How is linear regression typically used?

• To forecast outcomes based on independent variables

• To explain correlation without causation

• To group data into categories

• To fit a line that best describes a relationship

In hypothesis testing, which hypothesis assumes no effect?

• Null hypothesis

• Alternative hypothesis

• Research hypothesis

• Positive correlation hypothesis

What is an example of a Black Swan event in history?

• Routine seasonal flu outbreaks

• 2008 financial crisis

• Gradual climate changes

• Sudden global pandemic

What does the alternative hypothesis represent?

• A hypothesis showing no effect

• A hypothesis suggesting a difference or effect exists

• The accepted truth without testing

• An assumed constant variable

Which correlation type suggests variables move inversely?

• Positive correlation

• Zero correlation

• Negative correlation

• Causal correlation

How does data mining assist organizations?

• By identifying meaningful patterns in large datasets

• By simplifying small, structured data

• By confirming all data relationships are causal

• By focusing only on qualitative analysis

In data synchronization, which issues can arise?

• Inconsistent update timings

• Duplicate data across systems

• Local file storage only

• Network communication delays

Which statement is true about causation in correlation analysis?

• High correlation means causation

• Causation can only be inferred with experimental control

• All correlations indicate some level of causation

• Correlation measures establish cause-effect relationships

What is the significance of data consistency in financial transactions?

• Prevents duplicate entries

• Ensures accurate account balances

• Allows for approximate values in balances

• Limits synchronization needs