These are explanations and solutions for IB past papers, not the official version. For official papers, you can go to IB Follet or access them through your school.
These are explanations and solutions for IB past papers, not the official version. For official papers, you can go to IB Follet or access them through your school.
These are explanations and solutions for IB past papers, not the official version. For official papers, you can go to IB Follet or access them through your school.
These are explanations and solutions for IB past papers, not the official version. For official papers, you can go to IB Follet or access them through your school.
02 Minutes
110 Marks
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IB MATH AI HL, Paper 1, November, 2022, TZ0, Solved Past Paper
Master the 2022 IB November for Paper 1 Mathematics AI HL with examiner tailored solutions and comments for TZ0
Question 1 [Explained]
Sergio is curious to discover if there's a connection between the type of berries adults prefer for breakfast and their earnings. He has collected information from 341 individuals and plans to use a chi-square (χ2) test to see if there's any statistical significance to this potential relationship.
The test will help determine if favorite berries and income levels are associated or if any observed patterns are simply due to chance. Sergio will interpret the results using a threshold of 10% to decide if the findings are noteworthy, which means that he's willing to accept a 10% risk of concluding there's an association when there might not be one.
Question 1 [a] [Explanation]
Formulate the null hypothesis.
The question asks you to state the null hypothesis, which is a fundamental step in hypothesis testing. The null hypothesis represents a statement of no effect or no difference, and it is what you test against the alternative hypothesis.
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Question 1 [b] [Explanation]
Calculate the chi-square statistic value.
In simpler terms, find the numerical value of the chi-square statistic for the given data.
This involves using the chi-square formula and the data provided to arrive at a final number.
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Question 1 [c] [Explanation]
Consider the scenario where we've conducted a
we are to articulate Sergio's conclusion based on the outcomes of the test. This involves interpreting the test results within the given context and providing a rationale for the inference made.
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