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Data Inquiry Start

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Data Inquiry Start

Ruben, Tevita and Tui are planning a faster post-office service. Use the information and your statistics skills to investigate data, choose useful questions and make a prediction.

What counts as data?

Data are facts or observations collected to answer a question. At the post office, the team records the number of parcels sent each day.

1.The team records parcel colour, number of parcels and parcel mass. Which is categorical data?
  • A parcel's recorded hue
  • Number of parcels
  • Parcel mass in kilograms
  • All three
2.Which two measurements are discrete numerical data: parcel colour, number of parcels, parcel mass, or number of stamps on a parcel?

Choose a useful question

Tui suggests investigating how many parcels are sent on different weekdays. A good statistical question expects answers that vary and can be collected as data.

3.Which question is best answered by collecting data from several customers?
  • What is the most common parcel destination?
  • What is the capital city of New Zealand?
  • How do you spell parcel?
  • Is a parcel a type of mail?
4.Ruben asks, “How many parcels are sent on each weekday?” Is this a statistical question? Explain what makes it suitable for an investigation.
5.Tevita asks, “Why is the post office busy?” What would make this question easier to investigate using data?

Plan and predict

The team counts parcels sent over five weekdays. The results are shown below.

Weekday

Parcels sent

Monday

18

Tuesday

23

Wednesday

16

Thursday

21

Friday

27

6.Use the table to identify the day with the most parcels and the day with the fewest parcels.
7.How many parcels were sent altogether across the five weekdays?
8.Before collecting data for another week, predict which weekday will have the most parcels. Give one reason based on the table.
9.Write one new statistical question the post office team could investigate. State what data they would collect and make a prediction.

3 printable pages

  • Data Inquiry Start, page 1 of 3: What counts as data?, Choose a useful question

    Page 1

  • Data Inquiry Start, page 2 of 3: Plan and predict

    Page 2

  • Data Inquiry Start, page 3 of 3: 9. Write one new statistical question the post office team could investigate. State what…

    Page 3

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