Revision (Grade 12 NSC Matric Mathematics): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
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Practise the questions
10 questions from this quiz
What is the formula for calculating the mean of a data set?
What is the formula for calculating the mean of a data set?
How do you find the median when you have an even number of data values?
How do you find the median when you have an even number of data values?
Average the two middle values
How is the range of a data set calculated?
How is the range of a data set calculated?
Maximum value - Minimum value
Why is the inter-quartile range less affected by outliers than the range?
Why is the inter-quartile range less affected by outliers than the range?
It focuses on middle 50% & ignores extremes
What is the relationship between standard deviation and variance?
What is the relationship between standard deviation and variance?
Standard deviation is the square root
What are the five values in a five number summary, in order?
What are the five values in a five number summary, in order?
Min, , Median, , Max
In a box plot, what does the rectangular box represent?
In a box plot, what does the rectangular box represent?
Middle 50% of data from to
In a normal distribution, what % of data falls within 2 standard deviations of the mean?
In a normal distribution, what % of data falls within 2 standard deviations of the mean?
95%
In a positively skewed distribution, how does the mean compare to the median?
In a positively skewed distribution, how does the mean compare to the median?
Mean is greater than median
What characterizes a negatively skewed distribution?
What characterizes a negatively skewed distribution?
Mean < median, tail extends left