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The graph shows the mean mass of males and females from the age of 1 year to 19 years - Edexcel - GCSE Biology - Question 2 - 2017 - Paper 1
Question 2
The graph shows the mean mass of males and females from the age of 1 year to 19 years. (i) Calculate the difference in the mean mass of males and females at the age... show full transcript
Worked Solution & Example Answer:The graph shows the mean mass of males and females from the age of 1 year to 19 years - Edexcel - GCSE Biology - Question 2 - 2017 - Paper 1
Step 1
Calculate the difference in the mean mass of males and females at the age of 19 years.
Answer
To determine the difference in mean mass at the age of 19 years, we first need to read the values from the graph. At the age of 19 years, the mean mass of males is approximately 75 kg and that of females is about 60 kg. Thus, the difference is calculated as follows:
Therefore, the difference in mean mass is 15 kg.
Step 2
Describe how the mean mass of the males would have been obtained at the age of 19 years.
Answer
The mean mass of males at the age of 19 years would have been obtained by collecting the weights of a representative sample of males aged 19. This could involve measuring the weight of each individual male and then calculating the average weight. This average is determined by using the formula:
ext{Mean mass} = rac{ ext{Sum of all individual weights}}{ ext{Number of individuals}}This method ensures that the mean mass accurately represents the population of male adolescents at this age.