Practise this objective
AI-marked practice questions tied to QCAA mark schemes for this exact LO. Free to start.
Start free practicePractice questions for this objective
Full questions, answers and worked solutions unlock when you start a free practice session.
Question 1
A farmer measures the mass of eggs produced by her flock of hens over a one-month period. The distribution of egg masses is approximately symmetric and bell-shaped, with no extreme outliers. The mean mass is 62 g and the standard deviation is 4 g.
(a) Identify whether the mass of eggs can be modelled by a normal random variable, and state the reason for your choice. [1 mark]
(b) Using the normal model, estimate the percentage of eggs with a mass between 58 g and 66 g. [2 marks]
Worked answer
🔒 Start free to see full answer
Question 2
Which of the following phenomena is most suitable to model using a normal distribution?
Worked answer
🔒 Start free to see full answer
Question 3
Which of the following scenarios describes a variable that would be most appropriately modelled by a normal distribution?
Worked answer
🔒 Start free to see full answer
More in Normal distributions