Year 8 Data Review

What type of data is:

Temperatures each day during Summer

• Continuous

• Discrete

• Ordinal

• Nominal

What type of data is:

The number of children on a bus

• Continuous

• Discrete

• Ordinal

• Nominal

What type of data is:

The type of fruit students prefer in a class

• Continuous

• Discrete

• Ordinal

• Nominal

What type of data is:

Grades awarded in a class (A - E)

• Continuous

• Discrete

• Ordinal

• Nominal

Is the following sample random or biased?

Who is your favourite AFL player? (Sample: WCE membership holders)

• Random

• Biased

• Umm.......

• No idea

Is the following sample random or biased?

Who is your favourite Maths teacher? (Sample: All Ashdale Students)

• Random

• Biased

• umm....

• No idea

A jar is filled with 150 jellybeans.

In a sample of 10, it is found that 3 are red.

Estimate the number of red jellybeans in the jar

• 30

• 5

• 45

• 500

A box is filled with 200 identically shaped toy cars.

A sample of 20 cars is taken and it is found that 6 are blue, 10 are red and the rest are yellow.

Estimate the number of yellow cars in the box.

• 50

• 40

• 60

• 100

A fisherman wants to know how many fish are in a pond near his house.

He captures a sample of 60 fish, tags them, then puts them back in the pond.

Six months later, he captures 100 fish and finds 10 are tagged.

Estimate the number of fish in the pond.

• 400

• 17

• 6

• 600

To estimate a local kangaroo population, 80 kangaroos are captured, tagged, then released.

One year later, 100 kangaroos are captured and if it found that 8 are tagged.

Estimate the total kangaroo population in the area.

• 800

• 6

• 10

• 1000