Tiêu đề Feb-March_2025_9709_62_QP - Crack A Level.pdf ✅

This document has 16 pages. Any blank pages are indicated. [Turn over Cambridge International AS & A Level DC (CE/SG) 343518/3 © UCLES 2025 *9596799086* MATHEMATICS 9709/62 Paper 6 Probability & Statistics 2 February/March 2025 1 hour 15 minutes You must answer on the question paper. You will need: List of formulae (MF19) INSTRUCTIONS ● Answer all questions. ● Use a black or dark blue pen. You may use an HB pencil for any diagrams or graphs. ● Write your name, centre number and candidate number in the boxes at the top of the page. ● Write your answer to each question in the space provided. ● Do not use an erasable pen or correction fluid. ● Do not write on any bar codes. ● If additional space is needed, you should use the lined page at the end of this booklet; the question number or numbers must be clearly shown. ● You should use a calculator where appropriate. ● You must show all necessary working clearly; no marks will be given for unsupported answers from a calculator. ● Give non-exact numerical answers correct to 3 significant figures, or 1 decimal place for angles in degrees, unless a different level of accuracy is specified in the question. INFORMATION ● The total mark for this paper is 50. ● The number of marks for each question or part question is shown in brackets [ ]. , , * 0000800000001 * ¬O. 4mHuOaE_{6W ¬>«tMxdsag ¥Ee5eUE 5E UeU¥U


4 © UCLES 2025 9709/62/F/M/25 2 A researcher records the time, T seconds, taken by adults to complete a questionnaire. The results for a random sample of 60 adults who completed the questionnaire this year are summarised as follows. n = 60 /t = 3678 t 226 313.36 2 / = (a) Find an unbiased estimate of E(T), and show that an unbiased estimate of Var(T) is 14.44. [3] ............................................................................................................................................................ ............................................................................................................................................................ ............................................................................................................................................................ ............................................................................................................................................................ ............................................................................................................................................................ ............................................................................................................................................................ ............................................................................................................................................................ ............................................................................................................................................................ ............................................................................................................................................................ ............................................................................................................................................................ ............................................................................................................................................................ ............................................................................................................................................................ ............................................................................................................................................................ ............................................................................................................................................................ ............................................................................................................................................................ ............................................................................................................................................................ ............................................................................................................................................................ ............................................................................................................................................................ ............................................................................................................................................................ ............................................................................................................................................................ ............................................................................................................................................................ ............................................................................................................................................................ ............................................................................................................................................................ ............................................................................................................................................................ * 0000800000004 * , , ĬÍĊ®Ġ ́íÈõÏĪÅĊàù ̧Ā× Ĭ3⁄4ĪñØĦĪħÙćÿÒÍÿġ ́ďĂ ĥåĕÕõĕąõąĕÅąÅõąÕÅÕ DO NOT WRITE IN THIS MARGIN DO NOT WRITE IN THIS MARGIN DO NOT WRITE IN THIS MARGIN DO NOT WRITE IN THIS MARGIN DO NOT WRITE IN THIS MARGIN