Question

Ali carries out an investigation and records his results in the table below.

Breathing rate at rest
(times per minute) 20
Breathing rate after exercising
(times per minute) 40


What is the aim of Ali's investigation?
b
Identify two variables which Ali should keep unchanged in his investigation to carry out a
fair test
How can Ali get a more accurate result from his investigation?​

Answer 1

Explanation:

•‘Fitness’ means different things to different

people. If we are discussing ‘fitness’ we need

to be sure we have agreed what it means. We

might disagree with a claim because we are

using a different idea of what fitness is.

•Data from a sample of people can be used as

evidence to support claims about fitness.

•Data from a small sample does not support

general claims about the population, but

might be a starting point for further study.