Question Working Answer Mark AO Notes Grade 1 a × 50 000 28 000 would vote for Party A. M1 2 M1 for multiplication of total population by proportion of B sample 28 000 × 0.9 = 25 200 M1 M1 for 28 000 × 0.9 This is over 50% of voters so Party A b A1 A1 for explanation that this represents over half the should be confident of winning. whole population and so a majority is likely 3 2 × 1260 = 315 315 students are in the sample. M1 2 M1 for multiplication of total population by proportion of B sample A1 A1 cao 2 3 At four different points in the concert, B1 2 B1 for explanation of general method of sampling B entrances or bars, each point to conduct 3 the survey on approximately 100 people B1 B1 for specific example related to the concert crowd each, trying to ask as many males as females. 2
Question Working Answer Mark AO Notes Grade 1 a b × 50 000 28 000 × 0.9 = 25 200 28 000 would vote for Party A. This is over 50% of voters so Party A should be confident of winning. M1 M1 A1 2 M1 for multiplication of total population by proportion of sample M1 for 28 000 × 0.9 A1 for explanation that this represents over half the whole population and so a majority is likely B 3 2 × 1260 = 315 315 students are in the sample. M1 A1 2 M1 for multiplication of total population by proportion of sample A1 cao B 2 3 At four different points in the concert, entrances or bars, each point to conduct the survey on approximately 100 people each, trying to ask as many males as females. B1 B1 2 3 B1 for explanation of general method of sampling B1 for specific example related to the concert crowd B 2
Higher_Skills_Statistics_MarkScheme_AQA.docx