Grade 12 Quizzes, Questions & Answers
Recent Grade 12 Quizzes
Questions: 22 | Attempts: 14 | Last updated: Jan 23, 2026
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Sample QuestionA random sample of 400 voters shows that 52% support a new policy. The margin of error is ±3%. What is the confidence interval for the true population proportion?
Questions: 22 | Attempts: 12 | Last updated: Jan 27, 2026
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Sample QuestionWhich of the following is the best point estimate of the population proportion who prefer the library based on the simulations?
Questions: 22 | Attempts: 25 | Last updated: Jan 23, 2026
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Sample QuestionA random sample of 40 students shows that 14 prefer studying in the morning. What is the best estimate of the proportion of all students who prefer morning study?
Questions: 22 | Attempts: 11 | Last updated: Jan 23, 2026
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Sample QuestionA carnival game costs $4 to play. You draw a ball with probabilities: 50% win $2, 30% win $4, 15% win $6, 5% win $20. What is the expected net gain/loss per play?
Questions: 21 | Attempts: 10 | Last updated: Jan 23, 2026
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Sample QuestionWhat is the expected payout (before subtracting the $3 cost) of one spin?
Questions: 24 | Attempts: 10 | Last updated: Jan 23, 2026
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Sample QuestionWhat is the expected value (mean) of tickets won per game?
Questions: 22 | Attempts: 12 | Last updated: Jan 23, 2026
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Sample QuestionWhat does the expected value of a random variable represent?
Questions: 23 | Attempts: 13 | Last updated: Jan 23, 2026
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Sample QuestionWhat is the cumulative frequency for students who studied 8 hours or less?
Questions: 22 | Attempts: 16 | Last updated: Jan 23, 2026
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Sample QuestionWhat is F(0)?
Questions: 20 | Attempts: 12 | Last updated: Jan 22, 2026
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Sample QuestionA satellite’s distance from Earth’s center is modeled by d(t) = 6800 + 400 cos(0.25 t) km, where t is in hours. What is the maximum distance?
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