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Grade 7 Statistics and Probability test pdf

Hey everyone! 👋 Getting ready for your Grade 7 Statistics and Probability test? No worries, I've got you covered! This guide breaks down the key concepts and includes a practice quiz to help you ace that exam. Let's get started! 🍀
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📚 Quick Study Guide

    🔍 Statistics: The science of collecting, organizing, analyzing, and interpreting data. 📊 Data Collection: Methods like surveys, experiments, and observations used to gather information. ➕ Measures of Central Tendency: Values that describe the center of a data set:
    • Mean: The average of a set of numbers. Calculated as: $Mean = \frac{Sum \, of \, values}{Number \, of \, values}$
    • Median: The middle value when the data is arranged in order.
    • Mode: The value that appears most frequently.
    📈 Range: The difference between the highest and lowest values in a data set. 🎲 Probability: The likelihood of an event occurring. Calculated as: $Probability = \frac{Number \, of \, favorable \, outcomes}{Total \, number \, of \, possible \, outcomes}$ 🎯 Sample Space: The set of all possible outcomes of an experiment. 🧩 Events: Specific outcomes or sets of outcomes. 💯 Probability Scale: Ranges from 0 (impossible) to 1 (certain).

🧪 Practice Quiz

  1. What is the median of the following data set: 2, 5, 8, 11, 15?
    • A) 5
    • B) 8
    • C) 11
    • D) 15

  2. A bag contains 3 red marbles, 2 blue marbles, and 5 green marbles. What is the probability of picking a blue marble?
    • A) 2/10
    • B) 3/10
    • C) 5/10
    • D) 1/2

  3. What measure of central tendency is most affected by outliers?
    • A) Mean
    • B) Median
    • C) Mode
    • D) Range

  4. What is the range of the following data set: 10, 15, 20, 25, 30?
    • A) 5
    • B) 10
    • C) 15
    • D) 20

  5. A spinner has 4 equal sections labeled 1, 2, 3, and 4. What is the probability of spinning a 2?
    • A) 1/2
    • B) 1/3
    • C) 1/4
    • D) 3/4

  6. Which of the following is NOT a method of data collection?
    • A) Survey
    • B) Experiment
    • C) Observation
    • D) Assumption

  7. What is the mode of the following data set: 3, 3, 5, 6, 6, 6, 8?
    • A) 3
    • B) 5
    • C) 6
    • D) 8
Click to see Answers
  1. B) 8
  2. A) 2/10
  3. A) Mean
  4. D) 20
  5. C) 1/4
  6. D) Assumption
  7. C) 6

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