Cognizant Cognizant Data Analysis and Interpretation 2

Question 1

In a frequency table, Class A: 0–10 has frequency 5, 10–20 has frequency 12, 20–30 has frequency 8. What is the modal class?

Accepted Answer

10–20

Answer

The modal class is the interval with the highest frequency; 10–20 has frequency 12, the highest.

Question 2

Two variables have a correlation coefficient of −0.85. What does this best describe?

Accepted Answer

Strong negative correlation

Answer

A correlation coefficient of −0.85 indicates a strong negative (inverse) relationship between the two variables.

Question 3

If a dataset has values 4, 8, 6, 5, 3, 7, what is the range?

Accepted Answer

5

Answer

Range = maximum − minimum = 8 − 3 = 5.

Question 4

A Cognizant analyst notices that 80% of issues come from 20% of software modules. Which analytical principle does this represent?

Accepted Answer

Pareto Principle

Answer

The Pareto Principle (80/20 rule) states that roughly 80% of effects come from 20% of causes.

Question 5

A scatter plot shows points clustered tightly along a line going from bottom-left to top-right. What does this indicate?

Accepted Answer

Strong positive correlation

Answer

Points tightly clustered along an upward-sloping line indicate a strong positive correlation.

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