Y7 - Data Management

To calculate the median having an odd number of numbers in a set of data, after ordering the numbers we:

• Calculate the mean using the three middle numbers

• Choose the middle number

• Calculate the mean using two middle numbers

• Choose the number before the middle number

Check these numbers.

58 24 46 28 42 28 24 50

Choose the right option about the MODE.

• There are three modes

• There are two modes

• There is one mode

• There is no mode

Check these numbers.

58 24 46 28 42 28 24 50

Calculating the MEAN you will find:

• 38.5

• 40.5

• 39.5

• 37.5

Check these numbers.

58 24 46 28 42 28 24 50

The MEDIAN will be:

• 38

• 35

• 29

• 24

Check these Tallies. According to this Survey, choose the WRONG statement.

• More than 10 people prefer Comedy Movies

• 4 people have chosen Horror Movies

• Action Movies and Other Movies have the same tallies

• Comedy is liked 4 times as long as Horror

Check this image. Choose the WRONG option according to this graph.

• This is a LINE GRAPH because it shows changes over time.

• Canada's population increased from 1901 to 2001

• In 1981, the population was 25 million people

• Between 1921 and 1941, the population was 15 million people