APCSP Data and Analysis 3

Question 1

A student wants to visualize the distribution of quiz scores for a class of 30 students. Which visualization is MOST appropriate?

Accepted Answer

Histogram

Answer

A histogram groups continuous data into bins and displays frequency, making it ideal for showing the distribution of scores.

Question 2

Which of the following BEST describes the purpose of data cleaning?

Accepted Answer

Removing duplicate or incorrect entries to improve data quality

Answer

Data cleaning involves identifying and correcting or removing inaccurate, incomplete, or duplicate records to improve dataset quality.

Question 3

A scatter plot shows points trending upward from left to right. What does this indicate?

Accepted Answer

A positive correlation between the two variables

Answer

An upward trend from left to right in a scatter plot indicates a positive correlation — as one variable increases, the other tends to increase as well.

Question 4

Which of the following is an example of structured data?

Accepted Answer

Rows and columns in a relational database table

Answer

Structured data is organized into a defined schema with rows and columns, such as a relational database or spreadsheet.

Question 5

A program processes a list of names and counts how many times each name appears. What computational task is being performed?

Accepted Answer

Aggregation

Answer

Aggregation summarizes or groups data — counting occurrences of each name is a classic aggregation operation.

(APCSP) AP Computer Science Principles Practice Test

(APCSP) AP Computer Science Principles Practice Test

APCSP Data and Analysis 3