Edexcel A-Level Biology AS 3p 8 Processing and Analysing Practical Data Questions

Write the formula, substitute unrounded values, complete intermediate calculations and round only the final biological result to the requested precision and units.

Exam points

calculate rates, means, percentage changes or ratios from biological measurements
complete ranks, differences or squared terms before calculating a statistical value
report processed values to required significant figures, standard form and biologically correct units

[Maximum number: 1]

The effect of atropine and propranolol on heart rate was investigated.

One group of people, group 1, were given propranolol each day for four days followed by atropine for four days.

A second group of people, group 2, were given atropine each day for four days followed by propranolol for four days.

The graph shows the results of this investigation.

Mean heart rate/ beats $\mathrm{min}^{-1}$

Figure for Question Edexcel A-Level Biology AS 3p 8 Processing and Analysing Practical Data Questions question 1 — Edexcel A-Level Biology AS

Calculate the change in mean heart rate for group 2 after 8 days.

Answer beats $\mathrm{min}^{-1}$

32 (beats $\mathrm{min}^{-1}$ )

(1)

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Edexcel A-Level Biology AS 3p 8 Processing and Analysing Practical Data Questions question 1