Lesson 2c.01
2c.01 Calculate different measures of spread: range, quartiles, interquartile range (IQR),... Quiz: Pearson Edexcel Statistics, Unit 2
20 questions
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Lesson 2c.01, Calculate different measures of spread: range, quartiles, interquartile range (IQR),...: 20 multiple choice questions for the Pearson Edexcel GCSE Statistics (1ST0), Unit 2: Processing, representing and analysing data, written with Revision Ninja.
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The 20 questions
-
What is the range of the values 3, 7, 9, 15 and 20?
- 17
- 20
- 15
- 12
-
What is the IQR of the values 1, 3, 5, 7, 9, 11 and 13?
- 8
- 12
- 6
- 10
-
What does the interquartile range measure?
- Middle 50% spread
- Total data range
- Lower 25% spread
- Upper 50% spread
-
A data set has LQ 25 and UQ 40. What is its IQR?
- 65
- 25
- 40
- 15
-
Data: 4, 8, 15, 16, 23 and 42. What is the IQR?
- 19
- 34
- 15
- 38
-
Data: 3, 5, 6, 9, 12, 14 and 20. What is the IQR?
- 6
- 9
- 17
- 11
-
Which measure of spread is least affected by outliers?
- Standard deviation
- Range
- Total
- IQR
-
Which measure of spread uses only the highest and lowest values?
- Median
- Range
- Mean
- IQR
-
How many equal parts do quartiles divide ordered data into?
- Two
- Three
- Four
- Ten
-
What does the 90th percentile represent in a data set?
- Value above 90%
- Value below 90%
- Top 90% of values
- Mean of 90 values
-
The range of a data set is 45 and the highest value is 52. What is the lowest value?
- 97
- 45
- 23
- 7
-
Values are 12, 14, 15, 18, 22, 35 and 40. What is the range?
- 23
- 22
- 28
- 40
-
Which set has the largest IQR: A (LQ 5, UQ 15), B (LQ 10, UQ 20), or C (LQ 3, UQ 30)?
- Set C
- Set B
- All are equal
- Set A
-
A data set has a range of 30 and an IQR of 8. What does this suggest?
- Zero data skew
- Uniform data spread
- Normal distribution
- Extreme outer values
-
Why is the range less useful than the IQR when a data set has one extreme value?
- Range uses extremes
- Range is always zero
- Range ignores data
- IQR uses all values
-
Data: 2, 5, 8, 11, 14, 17, 20 and 23. What is the IQR?
- 18.5
- 6.5
- 9
- 12
-
Which percentiles define the interpercentile range used for higher tier analysis of spread?
- 5th and 95th
- 10th and 90th
- 25th and 75th
- 1st and 99th
-
The highest value is 84 and the lowest is 19. What is the range?
- 65
- 85
- 60
- 103
-
A data set has an LQ of 20 and a UQ of 35. Which change increases the IQR?
- Lowering LQ to 15
- Raising LQ to 25
- Lowering UQ to 30
- Raising UQ to 30
-
What must be true for a data set if its range is equal to 0?
- No outliers exist
- Median is zero
- All values zero
- All values equal
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