AQA GCSE STATISTICS 8382/1F FOUNDATION TIER PAPER 1 Mark scheme Version 1.0 MAY 2023

GCSE STATISTICS 8382/1F FOUNDATION TIER PAPER 1 Mark scheme Version 1.0 MAY 2023 Mark schemes are prepared by the Lead Assessment Writer and considered, together with the relevant questions, by a panel of subject teachers. This mark scheme has been prepared for practice papers and has not, therefore, been through the process of standardising that would take place for live papers. Further copies of this mark scheme are available from Glossary for mark schemes GCSE examinations are marked in such a way as to award positive achievement wherever possible. For GCSE Statistics papers, marks are awarded under various categories. If a student uses a method which is not explicitly covered by the marking instructions the same principles of marking should be applied. Credit should be given to any valid methods. Examiners should seek advice from their senior examiner if in any doubt. Key to mark types M Method marks are awarded for a correct method which could lead to a correct answer. A Accuracy marks are awarded when following on from a correct method. It is not necessary to always see the method. This can be implied. B Marks awarded independent of method. ft Follow through marks. Marks awarded for correct working following a mistake in an earlier step. SC Special case. Marks awarded for a common misinterpretation which has some mathematical worth. M dep A method mark dependent on a previous method mark being awarded. B dep A mark that can only be awarded if a previous independent mark has been awarded. oe Or equivalent. Accept answers that are equivalent. eg accept 0.5 as well as 1 2 [a, b] Accept values between a and b inclusive. [a, b) Accept values a ≤ value < b 3.14 … Accept answers which begin 3.14 eg 3.14, 3.142, 3.1416 Use of brackets It is not necessary to see the bracketed work to award the marks. Examiners should consistently apply the following principles Diagrams Diagrams that have working on them should be treated like normal responses. If a diagram has been written on but the correct response is within the answer space, the work within the answer space should be marked. Working on diagrams that contradicts work within the answer space is not to be considered as choice but as working, and is not, therefore, penalised. Responses which appear to come from incorrect methods Whenever there is doubt as to whether a student has used an incorrect method to obtain an answer, as a general principle, the benefit of doubt must be given to the student. In cases where there is no doubt that the answer has come from incorrect working then the student should be penalised. Questions which ask students to show working Instructions on marking will be given but usually marks are not awarded to students who show no working. Questions which do not ask students to show working As a general principle, a correct response is awarded full marks. Misread or miscopy Students often copy values from a question incorrectly. If the examiner thinks that the student has made a genuine misread, then only the accuracy marks (A or B marks), up to a maximum of 2 marks are penalised. The method marks can still be awarded. Further work Once the correct answer has been seen, further working may be ignored unless it goes on to contradict the correct answer. Choice When a choice of answers and/or methods is given, mark each attempt. If both methods are valid then M marks can be awarded but any incorrect answer or method would result in marks being lost. Work not replaced Erased or crossed out work that is still legible should be marked. Premature approximation Rounding off too early can lead to inaccuracy in the final answer. This should be penalised by 1 mark unless instructed otherwise. Continental notation Accept a comma used instead of a decimal point (for example, in measurements or currency), provided that it is clear to the examiner that the student intended it to be a decimal point. Q Answer Marks Comments 1 0.6 B1 oe 2 18 B1 oe 3 132 B1 oe 4 Send twice as many questionnaires out B1 oe 5 (a) Tallying method employed including use of ‘five bar gate’ at least once M1 Correct tallies for all three letters: Q III N IIIII V IIIII A2 A1 one correct Frequencies correct for their tallies and headings of tally and frequency B1 ft If tallying omitted, award SC1 for each correct frequency up to a maximum of SC3 Additional guidance 4 marks Q Answer Marks Comments 5 (b) Easier to see how many of each noise level B1 oe Additional guidance Allow any reference to ease of processing or representing 5 (c) 3 13 B2 ft oe B1 numerator B1 denominator ft their frequencies Additional guidance If there are no frequencies, follow through their tallies Allow correct answer or correct follow through. 5 (d)(i) 283 (degrees) seen B1 [281, 285] May be implied by answer their 283 1 or 11.01 or better 360 M1 oe 11 A1 Additional guidance 11.0 or 11:00 B1M1A0 5 (d)(ii) It is winter for one and summer for the other B1 oe any general reference to time of year eg less likely to have windows or doors open to hear noise (in winter) eg fewer events are likely to be going on (in winter) Q Answer Marks Comments 6 (a) 3 + (–1) + (0) + 2 + …. or 50 seen M1 oe Their 50 ÷ 10 or 5 M1 dep 9.05 A1 Additional guidance 5 minutes late on average M2A0 6 (b) There is a single very high value (outlier) B1 oe 6 (c) Either median or mode M1 oe Suitable reason eg represents most of the data better A1 oe eg not affected by the outlier 6 (d) No value can be allocated for this day B1 oe 7 (a) 200 B1