OCR Mean, Variance and Standard Deviation Questions

2 mean, variance and standard deviation questions from OCR A-Level Maths past papers with mark schemes.

2 questions Statistics
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Q8
Stem and Leaf Diagram, Mean, Variance and Standard Deviation
OCR June 2019 6 marks Paper 2
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Q11
Mean, Variance and Standard Deviation, Normal Distribution
OCR October 2020 9 marks Paper 2
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