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Data Analysis and Statistics Flashcards

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

Read the first 6 Data Analysis and Statistics flashcards as text

  1. The ages of 7 students are: 14, 16, 15, 17, 14, 18, 15. What is the median age?

    Answer: 15

    Sorted: 14, 14, 15, 15, 16, 17, 18. The median (4th value) is 15.

  2. A survey found that 45% of students prefer math. If 200 students were surveyed, how many prefer math?

    Answer: 90

    0.45 × 200 = 90 students.

  3. The data set {3, 7, 7, 9, 11} has a mean of 7.4. What is the range?

    Answer: 8

    Range = highest - lowest = 11 - 3 = 8.

  4. Which measure of central tendency is most affected by an extreme outlier?

    Answer: Mean

    The mean uses all data values, so a very large or small outlier pulls it significantly.

  5. A scatter plot shows a strong negative correlation. This means as x increases, y:

    Answer: decreases

    A negative correlation means as one variable increases, the other decreases.

  6. A class scored: 72, 85, 90, 88, 76, 92, 85. What is the mode?

    Answer: 85

    85 appears twice; all other values appear once. Mode = 85.

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Sources & references

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  1. bsss.act.edu.au — Eligibility, exam format, passing score · verified Oct 2026
  2. bsss.act.edu.au — Test delivery, late registration, retake policy · verified Oct 2026