A-LevelMathematicsProbability and statisticsOct/Nov 2021Paper 6 Q68 Marks
The random variable T denotes the time, in seconds, for 100 m races run by Tania. T is normally distributed with mean µ and variance σ². A random sample of 40 races run by Tania gave the following results. n = 40 Σt = 560 Σt² = 7850
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