Mean (Edexcel GCSE Statistics): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
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Practise the questions
10 questions from this quiz
Find the midpoint of the interval 20 < x ≤ 30.
Find the midpoint of the interval 20 < x ≤ 30.
25
Midpoint of the interval 5 ≤ x < 15?
Midpoint of the interval 5 ≤ x < 15?
10
Find the mean for 0 < x ≤10 f=2 and 10 < x ≤20 f=3.
Find the mean for 0 < x ≤10 f=2 and 10 < x ≤20 f=3.
11
What is Σfx for midpoints 5,15,25,35,45 with f 8,12,14,11,5?
What is Σfx for midpoints 5,15,25,35,45 with f 8,12,14,11,5?
1180
Using Σfx=1180 and Σf=50 what's the mean?
Using Σfx=1180 and Σf=50 what's the mean?
23.6
Compute f×x for interval 30 < x ≤ 40 with f = 11.
Compute f×x for interval 30 < x ≤ 40 with f = 11.
385
Midpoint of the interval 0 ≤ x ≤ 9 is:
Midpoint of the interval 0 ≤ x ≤ 9 is:
4.5
Find mean for intervals 0 < x ≤20 f=3 and 20 < x ≤40 f=2.
Find mean for intervals 0 < x ≤20 f=3 and 20 < x ≤40 f=2.
18
Why is the mean from grouped data an estimate?
Why is the mean from grouped data an estimate?
We assume values lie at midpoints
Estimate the mean from grouped data: intervals 0-10 f=8; 10-20 f=12; 20-30 f=14; 30-40 f=11; 40-50 f=5.
Estimate the mean from grouped data: intervals 0-10 f=8; 10-20 f=12; 20-30 f=14; 30-40 f=11; 40-50 f=5.
23.6 years