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Handling Data and Statistics Flashcards

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

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  1. A questionnaire asks: 'Don't you agree that fast food is unhealthy?' What is wrong with this question?

    Answer: It is a leading question that influences the answer

    The phrase 'Don't you agree' steers respondents toward a particular answer, making it a biased leading question.

  2. The interquartile range (IQR) of a data set is 12 and Q1 = 8. What is Q3?

    Answer: 20

    IQR = Q3 − Q1, so Q3 = IQR + Q1 = 12 + 8 = 20.

  3. Two events A and B are mutually exclusive. P(A) = 0.4 and P(B) = 0.3. What is P(A or B)?

    Answer: 0.7

    For mutually exclusive events, P(A or B) = P(A) + P(B) = 0.4 + 0.3 = 0.7.

  4. A data set contains values: 5, 8, 8, 9, 12, 14, 20. Which value, if added, would NOT change the mode?

    Answer: 8

    The current mode is 8 (appears twice); adding another 8 keeps 8 as the mode.

  5. In a stratified sample of 50 from a population of 200 (80 men, 120 women), how many women should be in the sample?

    Answer: 30

    Women's proportion = 120/200 = 0.6; sample women = 0.6 × 50 = 30.

  6. A box plot shows: minimum = 5, Q1 = 10, median = 15, Q3 = 22, maximum = 30. What is the interquartile range?

    Answer: 12

    IQR = Q3 − Q1 = 22 − 10 = 12.

  7. A set of data is described as 'positively skewed.' Where does the tail of the distribution point?

    Answer: To the right

    A positively skewed distribution has a longer tail extending to the right (toward higher values).