APCSP Data and Analysis 2

Question 1

A dataset contains the ages of 1,000 survey respondents. Which measure of center is MOST affected by a few extremely old respondents?

Accepted Answer

Mean

Answer

The mean is sensitive to outliers because it incorporates every value in the calculation, so extreme values pull it significantly.

Question 2

Which file format stores data as plain text with values separated by commas and is widely used for exchanging tabular data?

Accepted Answer

CSV

Answer

CSV (Comma-Separated Values) stores tabular data as plain text with commas delimiting fields, making it universally readable.

Question 3

A program filters a list of temperatures, keeping only values above 100°F. After filtering 500 readings, only 3 remain. What is the BEST description of those 3 values?

Accepted Answer

Outliers

Answer

Values that fall far outside the typical range of a dataset are called outliers, and here only 3 of 500 readings exceeded 100°F.

Question 4

Which of the following BEST describes lossy data compression?

Accepted Answer

Some data is permanently discarded to reduce file size

Answer

Lossy compression permanently removes some data to achieve smaller file sizes, meaning the original cannot be perfectly reconstructed.

Question 5

A researcher collects data on ice cream sales and drowning incidents and finds a strong positive correlation. What is the MOST reasonable conclusion?

Accepted Answer

A third variable (hot weather) likely explains both

Answer

Correlation does not imply causation; hot summer weather is a confounding variable that increases both ice cream sales and swimming (and thus drowning risk).

(APCSP) AP Computer Science Principles Practice Test

(APCSP) AP Computer Science Principles Practice Test

APCSP Data and Analysis 2