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2 Statistics

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Question 56

Two groups have regression lines y=5+1.8xy=5+1.8xy=5+1.8x and y=23+0.6xy=23+0.6xy=23+0.6x. The observed xxx-range for both groups is 4≤x≤124\leq x\leq124≤x≤12.

a.

Find where the lines intersect.

[3]
b.

Determine which line gives the larger prediction throughout the observed range.

[2]
c.

Explain why the intersection should not be interpreted as an observed equality.

[1]
Markscheme

2 Statistics Questions

  1. A Level
  2. /Maths
  3. /2 Statistics

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