Practice Test GeeksNSAA - Natural Sciences Admissions Assessment Practice Test
← All NSAA Flashcard Decks

NSAA Mathematics - Statistics and Probability Flashcards

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

Read the first 6 NSAA Mathematics - Statistics and Probability flashcards as text

  1. The mode of the data set {4, 7, 7, 3, 4, 7, 9} is:

    Answer: 7

    7 appears three times, more than any other value, so the mode is 7.

  2. A box has 3 defective and 7 non-defective items. Two items are drawn without replacement. What is the probability both are defective?

    Answer: 1/15

    P(both defective) = (3/10) × (2/9) = 6/90 = 1/15.

  3. Which of the following is the correct definition of standard deviation?

    Answer: The square root of the variance

    Standard deviation is the square root of the variance, measuring spread around the mean.

  4. If a data set has a positive skew, which relationship is typically true?

    Answer: Mode < Median < Mean

    In a positively skewed distribution, the tail extends to the right, pulling the mean above the median, which is above the mode.

  5. What is the expected value of a fair six-sided die roll?

    Answer: 3.5

    E(X) = (1+2+3+4+5+6)/6 = 21/6 = 3.5.

  6. A scatter plot shows a correlation coefficient of r = -0.9. This indicates:

    Answer: Strong negative correlation

    r = -0.9 indicates a strong negative linear correlation between the two variables.

How this page was made: written with AI tools and published by Nathan Beja, founder of Practice Test Geeks, who is responsible for its content. Exam facts are checked against the official sources listed below. Not reviewed by a subject-matter expert. Editorial policy

Sources & references

Exam facts on this page (fees, format, dates, passing scores) are checked against these official sources; the date is our last check. Editorial policy

  1. esat-tmua.ac.uk — Late registration, registration deadline, fees, exam format, passing score, registration, score release, test dates, time limit, exam information · verified Oct 2026
  2. undergraduate.study.cam.ac.uk — Eligibility · verified Oct 2026
  3. pearsonvue.com — Test delivery, retake policy · verified Oct 2026