Year 7 Statistical Investigation Activity 1 NZCM p347-348

Finn did a survey to discover student preferences for the class trip. One of the questions he asked was "Which of these places do you want to visit most?"
Which of these collection sheets do you think is better? Why?

The political "Deseat Party" rang 12 people who were friends of the people in the party and asked them if they were going to vote for them. Nine said they would. The party then put an advertisement in the paper the next day (see photo).

Give two things wrong with the way Deseat collected the data.

Is the statement they made in the paper reasonable? Explain.

What might Suki (in photo) find out from this survey?

How could she collect the data?

Suki collected data from 12 of her friends. Are 12 students enough?

• Yes

• No

Is it a representative sample of the students in the class?

Do you agree with Tana? Explain your answer.

How could you collect the data for Sheet A?

• Ask students to write their favourite natural disaster

• Use seismograph readings from a geological website

• Interview people about their feelings on earthquakes

• Record weather temperatures across New Zealand

How could the data be collected for Sheet B?

• Install a sensor or tally each time it's opened

• Ask people how often they eat

• Count food items in the fridge

• Watch a video of a fridge being used

How could the data be collected for Sheet C?

• Ask players their favourite position

• Record the number of bats they own

• Watch cricket on TV

• Track games and gather statistics