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.
1 Hours 30 Minutes
80 Marks
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IB MATH AA SL, Paper 2, May, 2021, TZ2, Solved Past Paper
Master the 2021 IB May for Paper 2 Mathematics AA SL with examiner tailored solutions and comments for TZ2
Question 1 [Explained]
Consider a café scenario where the delay from when a customer orders to when they receive their coffee depends on the number of customers already waiting for their orders. Sarah, a frequent visitor to this café, made visits over five successive days. During these visits, the table provided records the count of customers, (x), who are ahead of Sarah in the queue and already waiting for their orders, along with the time, ( y) minutes, Sarah had to wait.
The data suggests a potential predictable pattern between (x) and ( y), which is expressed through the linear regression line equation ( y = ax + b).
Number of customers (x) | 3 | 9 | 11 | 10 | 5 |
Sarah’s waiting time ( y) | 6 | 10 | 12 | 11 | 6 |
Question 1 [a] [i] [Explanation]
To determine the values of a and b, let's first identify the relationships or constraints within the given expressions or diagrams, focusing on how these two variables interact or depend on each other. Ensure the calculations consider all necessary factors or conditions explicitly mentioned for a and b. This approach helps us accurately assess each variable's role and value in the context provided.
Question 1 [a] [ii] [Explanation]
The question you're asking involves calculating the value of Pearson's product-moment correlation coefficient, often symbolized as r. This coefficient measures the strength and direction of a linear relationship between two continuous variables.
Question 1 [b] [Explanation]
The question asks to interpret the value of a particular variable, a, specifically within the context provided in the earlier solution of part (a)(i). It wants a detailed understanding of a's significance in that solution.
Video Solution by an IB Examiner
Question 1 [c] [Explanation]
On another occasion when Sarah visits a café, she places an order for coffee, joining seven other customers who are already waiting for their orders.
Using the previously calculated result from part (a)(i), could you estimate how long Sarah will have to wait before she receives her coffee?
Keep in mind, the question assumes you have access to some prior data or calculations about the waiting time experienced by the other customers, indicated by part (a)(i).
Video Solution by an IB Examiner
