Practice Interquartile Range (iqr) (4.2) - Descriptive Statistics - 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.
Calculate the IQR for the dataset: 2, 5, 7, 10, 12.
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Order the dataset first and find Q1 and Q3.
Question 2.
What does it mean if the IQR is small?
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Think about how close data points are to each other.
3Question 3.
What does the IQR measure?
- The average of the dataset
- The spread of the middle 50% of the data
- The maximum value in the dataset
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Think about which part of the data is being considered.
4Question 4.
True or False: A high IQR indicates low variability.
- True
- False
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Consider how spread out numbers affect variability.
Question 5.
You have two datasets: A - 2, 3, 5, 7, 11 and B - 1, 4, 4, 4, 10. Calculate the IQR for both and discuss the differences.
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Don't forget to sort both datasets before finding Q1 and Q3.
Question 6.
A teacher wants to find out the spread of grades in two classes. Class 1 has the following grades: 65, 78, 85, 90, 92. Class 2 has 55, 60, 85, 90, 95. Find the IQR for both classes.
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Remember to calculate quartiles for both after sorting.

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