Interpreting bar charts

Maths

Univariate data

The questions in this quiz all relate to the bar chart below, which shows the scores achieved by a class in a test. First, how many people scored 15 marks?

What was the median (it may be useful to draw a frequency table, or to write out all the data)?

What was the mean (it may be useful to draw a frequency table, and you may need a calculator to work it out)?

The questions in the quiz are about the table below, which is a frequency table showing the results of a survey which asked how many siblings students in a class had. First, how many people answered the survey?

Starter Quiz