19 and B1 3 B1 for report that includes an awareness of change H Students’ diagrams, measures reports will vary. over time and which wines are increasing and which are decreasing in popularity B1 B1 for appropriate diagram / graph oe M1 M1 for calculation of ranges to show which wines are most popular oe. M1 M1 for calculation of mean, median or mode to show average number of cases of wine purchased purchased oe A1 A1 for interpretation of calculations within the report 5 20 From the cumulative frequency (cf) graph M1 2 M1 for identification of frequencies from cf graph H (some variance depending on M1 3 M1 for identification of mid-points of classes from cf students’ reading of unmarked intervals on graph): graph A1 A1 for table to show data derived from cf graph oe Estimated mean = = minutes 27.6… Estimate: 28 minutes (to the nearest A1 A1 for their estimated mean (ft) minute). Allow range of 26–29 minutes 4 21 M1 2 M1 for explanation of use of graph H Find the top 15% on the cumulative A1 A1 for explanation of where to find the minimum grade frequency scale, read along to the graph and read down to the marks. The mark seen will be the minimum mark needed for this top grade. 2
19 Students’ diagrams, measures and reports will vary. B1 B1 M1 M1 A1 3 B1 for report that includes an awareness of change over time and which wines are increasing and which are decreasing in popularity B1 for appropriate diagram / graph oe M1 for calculation of ranges to show which wines are most popular oe. M1 for calculation of mean, median or mode to show average number of cases of wine purchased purchased oe A1 for interpretation of calculations within the report H 5 20 Estimated mean = = 27.6… minutes From the cumulative frequency (cf) graph (some variance depending on students’ reading of unmarked intervals on graph): Estimate: 28 minutes (to the nearest minute). M1 M1 A1 A1 2 3 M1 for identification of frequencies from cf graph M1 for identification of mid-points of classes from cf graph A1 for table to show data derived from cf graph oe A1 for their estimated mean (ft) Allow range of 26–29 minutes H 4 21 Find the top 15% on the cumulative frequency scale, read along to the graph and read down to the marks. The mark seen will be the minimum mark needed for this top grade. M1 A1 2 M1 for explanation of use of graph A1 for explanation of where to find the minimum grade H 2
Higher_Skills_Statistics_MarkScheme_AQA.docx