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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.

Read the first 7 Handling Data and Statistics flashcards as text

  1. A probability experiment involves rolling a fair six-sided die. What is the probability of rolling a number greater than 4?

    Answer: 1/3

    Numbers greater than 4 are 5 and 6 (2 outcomes out of 6): probability = 2/6 = 1/3.

  2. A back-to-back stem-and-leaf diagram compares two classes' test scores. What is the main advantage of this display?

    Answer: It compares two data sets while preserving individual values

    A back-to-back stem-and-leaf diagram lets you compare two groups while keeping all original data values visible.

  3. Data collected by asking people on the street their opinion is an example of which sampling method?

    Answer: Convenience sampling

    Convenience sampling selects whoever is easiest to reach, such as people passing by on a street.

  4. A cumulative frequency graph (ogive) is used to estimate which statistic directly from the graph?

    Answer: The median

    The median can be read from a cumulative frequency graph by finding the value at half the total frequency.

  5. If the probability of an event occurring is 0.35, what is the probability that it does NOT occur?

    Answer: 0.65

    Complementary probability = 1 − 0.35 = 0.65.

  6. A data set of 20 values is arranged in order. In which position is the lower quartile (Q1)?

    Answer: 5th value

    Q1 is at the 1/4 position: 1/4 × 20 = 5th value.

  7. A histogram has class widths of 5 and a frequency density of 4 for one bar. What is the frequency for that class?

    Answer: 20

    Frequency = frequency density × class width = 4 × 5 = 20.