Lesson S2.3.1
S2.3.1 Measures of central tendency and variation Quiz: Pearson Edexcel Maths, Unit 12
20 questions
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Lesson S2.3.1, Measures of central tendency and variation: 20 multiple choice questions for the Pearson Edexcel Maths (9MA0), Unit 12: Data presentation and interpretation, written with Revision Ninja.
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The 20 questions
-
Which measure of central tendency is most affected by extreme outliers in a dataset?
- Interquartile range
- Mode
- Median
- Mean
-
What does the symbol Sigma (capital sigma) represent in statistical formulae?
- Sum of
- Standard deviation
- Square root
- Variance
-
Which summary statistic divides an ordered dataset into four equal parts?
- Percentile
- Decile
- Quartile
- Median
-
What is the positive square root of the variance called?
- Interquartile range
- Mean deviation
- Standard deviation
- Root mean square
-
Which measure of spread is unaffected by extreme outliers in a dataset?
- Range
- Variance
- Standard deviation
- Interquartile range
-
What term describes data that has two distinct peaks in its frequency distribution?
- Skewed
- Bimodal
- Symmetrical
- Unimodal
-
Which statistical measure represents the middle value of an ordered dataset?
- Median
- Range
- Mode
- Mean
-
What is the difference between the maximum and minimum values in a dataset?
- Standard deviation
- Variance
- Interquartile range
- Range
-
Find the median of the dataset: 3, 7, 9, 12, 15.
- 7
- 12
- 9.2
- 9
-
Find the mode of the dataset: 4, 5, 5, 6, 7, 8, 8, 8, 9.
- 6.5
- 7
- 5
- 8
-
Calculate the mean of the values: 10, 20, 30, 40.
- 20
- 35
- 30
- 25
-
If every value in a dataset is multiplied by three, what happens to the mean?
- Multiplied by three
- Multiplied by nine
- Unchanged
- Increased by three
-
If five is added to every value in a dataset, what happens to the variance?
- Unchanged
- Multiplied by five
- Increased by five
- Increased by twenty-five
-
Calculate the range of the dataset: -4, 2, 7, 12, 19.
- 15
- 23
- 19
- 27
-
If a distribution has a long tail to the right, what is its skewness?
- Negative skew
- Zero skew
- Positive skew
- Symmetrical
-
What is the coding transformation used to simplify large numbers into smaller coded values x-bar?
- y equals x plus a
- y equals a x plus b
- y equals x minus a over b
- y equals b over x
-
In a positively skewed distribution, which average is typically the largest?
- Mode
- Median
- Mean
- Interquartile range
-
What does the root mean square deviation from the mean describe?
- Standard deviation
- Variance
- Median deviation
- Range
-
If a distribution has a long tail to the left, what is its skewness?
- Zero
- Symmetrical
- Negative
- Positive
-
What term describes the lower quartile of a dataset?
- IQR
- Q3
- Q1
- Q2
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