Practice Test Geeks(APCSP) AP Computer Science Principles Practice Test
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Data and Analysis Flashcards

7 cards from real APCSP practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 7 Data and Analysis flashcards as text

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

    Answer: Mean

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

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

    Answer: CSV

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

  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?

    Answer: Outliers

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

  4. Which of the following BEST describes lossy data compression?

    Answer: Some data is permanently discarded to reduce file size

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

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

    Answer: A third variable (hot weather) likely explains both

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

  6. In a spreadsheet, a column labeled 'ZIP Code' contains values like 07001. If the program treats this column as a number and drops the leading zero, what type of problem has occurred?

    Answer: Data type mismatch causing data loss

    Treating ZIP codes (which are identifiers, not quantities) as numeric data types causes leading zeros to be dropped, losing meaningful information.

  7. Which of the following is an example of metadata?

    Answer: The date a photo was taken and the camera model used

    Metadata is data about data — the date taken and camera model describe the photo without being part of the image content itself.