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End-of-unit review
End-of-unit review
1 Hassan is investigating whether good basketball players are also good at rugby.
Write a hypothesis for his investigation.
2 When carrying out a statistical investigation, Maha follows these steps.
c Choose a hypothesis to test.
d Decide on the question, or questions, to ask.
e Decide what data to collect.
f Decide how to collect the data.
g Decide on the sample size.
h Decide how accurate the data needs to be.
There are 30 students in Maha’s class.
Maha wants to know whether boys or girls eat more chocolate.
a Write down examples for each of the six steps that Maha will follow.
b What other factors should Maha consider?
c Write down some problems Maha may have in collecting her data.
3 Sasha wants to investigate the average number of pairs of shoes owned by Canadian women.
She finds data that shows the average number of pairs of shoes owned by American women is 19.
I can assume that the average number of pairs
of shoes owned by Canadian women is 19.
a Explain why it might be reasonable for Sasha to make this assumption.
b Explain why it might not be reasonable for Sasha to make this assumption.
4 Maha wants to find out the average salary of a shop assistant in the UK.
She finds data that shows that the average salary of a shop assistant in five cities in the UK is £15 000.
I can assume that the average salary of a
shop assistant in the UK is £15 000.
a Give a reason why Maha could be right to make this assumption.
b Give a reason why Maha could be wrong to make this assumption.
5 Harsha is investigating the film-watching habits of Number of fi lms Tally Frequency
men and women.
1
She asks 30 men and 50 women how many films they 2−4
watched last week.
She records the information on a data-collection sheet 4−6
similar to this one.
a Give four reasons why her data-collection sheet is not suitable.
b Design a better data-collection sheet.
6 These are the numbers of goals scored by a football team in the 20 matches they played.
0 2 2 0 0 0 1 3 2 0
1 1 3 1 0 2 3 6 0 1
a Record this information onto a data-collection sheet.
b Write down one conclusion that you can make from the results on your data-collection sheet.
6 Planning and collecting data 63
