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2 Statistics

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Question 411

Using the 184 LDS9 records for which both waist circumference and BMI are available, software gives the regression model

b=0.337w−4.63b=0.337w-4.63b=0.337w−4.63,

where w w\,w is waist circumference in cm and b b\,b is BMI. The correlation coefficient is 0.878.

a.

Interpret the gradient of the regression line in context.

[2]
b.

Estimate the BMI of an individual whose waist circumference is 90 cm.

[1]
c.

State what the value 0.878 suggests about the scatter diagram.

[1]
Markscheme

2 Statistics Questions

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

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