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Paper 1Statistical Techniques5 marks
A student collected data on the number of hours studied and the marks obtained by 8 students. The data pairs are: (2, 50), (3, 55), (4, 60), (5, 65), (6, 70), (7, 75), (8, 80), (9, 85).
Data Table
Hours Studied and Marks Obtained
Data pairs showing hours studied and marks obtained by 8 students.
| Hours Studied (x) | Marks Obtained (y) |
|---|---|
| 2 | 50 |
| 3 | 55 |
| 4 | 60 |
| 5 | 65 |
| 6 | 70 |
| 7 | 75 |
| 8 | 80 |
| 9 | 85 |
- a[5]
Calculate Use the method of semi-averages to find the equation of the line of best fit in the form y = mx + c.
Aim for approximately 5 distinct marking points.
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Answer every part before opening the mark scheme.
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