Unit 4

The numbers of pens owned by 7 students are listed below:

3, 6, 6, 2, 8, 5, 4

Work out the median number of pens owned.

Write down the range of the following data:

5, 12, 8, 3, 10

The table shows the number of books read by 8 friends in a month.

Work out the mode number of books read.

A coin is tossed once.

Write down the probability of getting a tail.

The marks out of 10 scored by 5 students in a quiz are:

5, 7, 8, 8, 10

For this data:

In a group, everyone has either 1, 2 or 3 pets. The mean number of pets per person is 2.

Explain, in one sentence, what this tells you about the group.

The table shows the colours of balls in a box.

One ball is taken at random from the box. Calculate the probability that the ball is red.

The ages (in years) of 9 members of a chess club are:

Work out the median, lower quartile, upper quartile, and inter-quartile range of these ages.

The test scores of 6 students are:

Complete the table by adding two rows for the mode and mean of these test scores. Give your answers in the table.

A football coach says, “The mean number of goals scored this season is 2, but the mode is 0.”

Explain, using the meanings of mean and mode, what this tells you about the football team’s performance.