A-LevelMathematicsProbability and statisticsFeb/Mar 2020Paper 6 Q78 Marks
A national survey shows that 95% of year 12 students use social media. Arvin suspects that the percentage of year 12 students at his college who use social media is less than the national percentage. He chooses a random sample of 20 students at his college and notes the number who use social media. He then carries out a test at the 2% significance level.
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