Unit 6: Planning and collecting data

Which method of collection would you use to collect this data ? (Experiment, Observation, Survey)

a. how often a slice of buttered bread lands 'butter down' when it is dropped 50 times

b. the number of books owned by people living in your street or village

c. the number of pars of glasses owned by students in your class

d. the number of people that go into your local dentist's surgery each hour

• a. experiment

  b. survey

  c. survey

  d. observation

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Which method of collection would you use to collect this data ? (Experiment, Observation, Survey)

a. how often a red card is drawn from a pack of playing cards in 50 draws

b. the different makes of cars parked in your local grocery store car park

c. how often students in your class have been to the cinema in the last month

d. how often a normal dice lands on a 6 when it is rolled 50 times

e. the number of students that ate fruit every day last week

• a. experiment

  b. observation

  c. survey

  d. experiment

  e. survey

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A book club has 410 members. The secretary of the club wants to know if the members would like a sudoku puzzle book to be included in the club magazine next month.

a. Give two reasons why the secretary should ask a sample of the members.

b. How many members of the book club should be in the sample?

• a. Cheaper, quicker and easier

  b. 41

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There are 48 students in the fitness club at Maha's school. Maha wants to know how many of these students brush their teeth at least twice a day. She decides to ask a sample of the population.

a. Should Maha ask a sample of the population?

b. How many people should be in her survey?

• a. No

  b. 48

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Write down whether each set of data is discrete or continuous.

a. the number of trees in a garden

b. the number of flowers in a garden

c. the mass of fruit grown in a garden

d. the length of a bookshelf in a classroom

the number of desks in a classroom

• a. discrete

  b. discrete

  c. continuous

  d. continuous

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Write down whether each set of data is discrete or continuous.

a. the number of students with long hair

b. the time taken to complete a maths test

c. the number of marks in the maths test

d. the number of pizza slices on a plate

e. the weight of a slice of pizza

• a. discrete

  b. continuous

  c. discrete

  d. discrete

  e. continuous

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"I have asked 10 people how tall they are, in centimetres. My results are 132, 144, 123, 155, 156, 175, 167, 150, 147 and 149." - Shen

Is Shen correct? Explain your answer.

• No, height is a measurement which is continuous data.

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