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.
01 Hours 30 Minutes
80 Marks
Calculator is allowed
IB MATH AA SL, Paper 2, November, 2021, TZ0, Solved Past Paper
Master the 2021 IB November for Paper 2 Mathematics AA SL with examiner tailored solutions and comments for TZ0
Question 1 [Explained]
In Lucy's music academy, eight students recently completed their piano diploma exams, with each student scoring out of a maximum of 150 points. Lucy, aiming to better understand their preparation, recorded the average number of hours per week that each student practiced in the weeks leading up to their exams. This data is detailed in a table she prepared.
To maintain clarity in her records, it's essential to compute the average practice time across all students, which she can then analyze to draw any correlations between practice hours and exam scores.
| Average weekly practice time (h) | 28 | 13 | 45 | 33 | 17 | 29 | 39 | 36 |
| Diploma score (D) | 115 | 82 | 120 | 116 | 79 | 101 | 110 | 121 |
Question 1 [a] [Explanation]
Determine the Pearson's product-moment correlation coefficient, denoted as r, for the given data set.
In simple terms, the question asks you to calculate a statistical measure called Pearson's correlation coefficient (r) which quantifies the strength and direction of the linear relationship between two variables in the provided data.
Video Solution by an IB Examiner
Question 1 [b] [Explanation]
The question asks for the values of two coefficients in a given regression equation that models the relationship between variables. The equation is given as (D = ah + b). You need to identify the specific values of the coefficients (a) and (b) from this equation.
This question essentially requires determining the slope and intercept of the linear regression model. The coefficient (a) represents the slope, and the coefficient (b) represents the intercept.
Video Solution by an IB Examiner
