Measures of dispersion for grouped data (Edexcel GCSE Statistics): Quizzes
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Practise the questions
10 questions from this quiz
How to find the 3rd decile from data with total n=80?
How to find the 3rd decile from data with total n=80?
(3/10)×80
What is the formula for the 45th percentile in a dataset?
What is the formula for the 45th percentile in a dataset?
(45/100)×n
How do you locate the decile position on a cumulative frequency graph?
How do you locate the decile position on a cumulative frequency graph?
Use the formula d/10×n
To find the 90th percentile with n=200, what is the position?
To find the 90th percentile with n=200, what is the position?
0.45×200
Which is the correct decile formula?
Which is the correct decile formula?
d/10×n
For the interpercentile range 20th to 80th, what are the percentiles?
For the interpercentile range 20th to 80th, what are the percentiles?
20 and 80
What does the interdecile range tell us?
What does the interdecile range tell us?
Spread of the middle 50%
What is the main purpose of using percentiles?
What is the main purpose of using percentiles?
To split data into 100 parts
Using n = 50, what is the position of the 4th decile?
Using n = 50, what is the position of the 4th decile?
20th value
If the 20th percentile ≈ 5 km and 80th ≈ 18 km, what's the interpercentile range?
If the 20th percentile ≈ 5 km and 80th ≈ 18 km, what's the interpercentile range?
13 km