A-Level MathematicsYear 2021Q1
6 Question 1 continued The data in Figure 1 is shown in Figure 2. Observed frequencies Month January February March April Total Type of whale Orca 190 203 89 12 494 Fin whale 45 133 33 0 211 Long-finned pilot whale 234 150 240 100 724 Total 469 486 362 112 1429 Figure 2 Some of the calculated expected values for a χ 2 test of independence are shown in Figure 3. Expected frequencies Month January February March April Total Type of whale Orca 162.1 168.0 125.1 494 Fin whale 69.3 71.8 211 Long-finned pilot whale 237.6 724 Total 469 486 362 112 1429 Figure 3
Paper Source:9ST0_03_que_20211023.pdf
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Exam Specification Info
This question is part of the UK A-Level Mathematics syllabus. In the actual exam, structured questions typically require linking specific keywords to gain full marks. Applaa helps you drill these topics.
Syllabus levelAdvanced Level (A-Level)
SubjectMathematics
Official MarksVariable (2–6 marks)