Sample medians and sample ranges (Edexcel GCSE Statistics): Flashcards
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If sample range is 0.4g within warnings, act?
If sample range is 0.4g within warnings, act?
No action needed
Calculate warning limits for target 125 σ=3.5
Calculate warning limits for target 125 σ=3.5
Warning limits: 118g and 132g
Is median 129g within warning limits 118–132?
Is median 129g within warning limits 118–132?
Yes — 129g lies within 118 and 132 (no action)
How to find median for a sample of 7 values?
How to find median for a sample of 7 values?
Sort values then pick the 4th (middle) value
Median of 15.2,14.9,15.3,15.0,15.1,14.9,15.1?
Median of 15.2,14.9,15.3,15.0,15.1,14.9,15.1?
Median = 15.1 g
Range of 15.2,14.9,15.3,15.0,15.1,14.9,15.1?
Range of 15.2,14.9,15.3,15.0,15.1,14.9,15.1?
Range = 0.4 g
Median action limits for 125g, σ=3.5?
Median action limits for 125g, σ=3.5?
114.5 g to 135.5 g
Median limits: target 125g, σ=3.5 — find limits
Median limits: target 125g, σ=3.5 — find limits
Warning 118g/132g; Action 114.5g/135.5g
Find range: weights 15.2,14.9,15.3,15.0,15.1,14.9,15.1
Find range: weights 15.2,14.9,15.3,15.0,15.1,14.9,15.1
Range = 15.3 − 14.9 = 0.4g
Is median 127g within warning? target125, σ=3.5
Is median 127g within warning? target125, σ=3.5
Yes; warning limits 118g–132g, 127g is within