KSA Data Analysis & Reporting 4

Question 1

Which type of variable is 'job series number' (e.g., 0343) best classified as?

Accepted Answer

Nominal categorical

Answer

Series numbers are labels for categories, so arithmetic on them is meaningless.

Question 2

An agency wants to know whether a training program improved employee scores. Which design gives the strongest evidence?

Accepted Answer

Comparing trained and untrained groups with random assignment

Answer

Random assignment with a control group best isolates the program's effect.

Question 3

What does a standard deviation measure?

Accepted Answer

The spread of values around the mean

Answer

Standard deviation quantifies how dispersed data points are around the average.

Question 4

You discover an error in a report you already submitted. What is the best action?

Accepted Answer

Promptly notify stakeholders, correct the report, and explain the change

Answer

Integrity requires timely, transparent correction of known errors.

Question 5

Which statistic would you use to measure the strength and direction of a linear relationship between two variables?

Accepted Answer

Pearson correlation coefficient

Answer

Pearson's r ranges from -1 to 1 and captures linear association.

KSA - Knowledge, Skills, and Abilities Practice Test