Practice Percentiles And Quantiles (6) - Normal Distribution - IB 10 Mathematics

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8 questions

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2 cards from this section. Quick, good the night before a test.
Exercise
6 questions · about 4 min · pass mark 70%. Hints available.
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Quiz
2 questions · about 1 min · pass mark 70%. Hints available.
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6 sample questions

Question 1.
What is the 70th percentile if the mean is 50 and standard deviation is 10? (Z-score = 0.524)
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Use the formula x = μ + zσ.
Question 2.
Which percentile represents the median?
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Think about where half the data falls.
3Question 3.
What does the 100th percentile represent?
- The highest score
- The lowest score
- The average score
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Think about what it means to cover all data.
4Question 4.
True or False: A value in the 25th percentile is better than 25% of the values.
- True
- False
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Revisit the definition of percentiles again.
Question 5.
In a set of data with a mean of 60 and a standard deviation of 15, if the 95th percentile is calculated, what percentage of data lies above this value?
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Remember the nature of percentiles when calculating above and below.
Question 6.
If a data set has a 25th percentile of 50 and a 75th percentile of 85, what does this indicate about the distribution?
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Reflect on what the quartiles represent in the context of distribution.

4 more questions in this section. Enroll free to practise them all.