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Mean, median mode and range (calculation from graphs and charts)

Interactive practice questions

Given the stem-and-leaf plot:

Stem Leaf
$2$2 $4$4  $9$9
$3$3 $4$4  $4$4 $4$4 $9$9
$4$4 $1$1 $9$9 
$5$5 $1$1 $8$8 $8$8
$6$6 $2$2 $2$2 $9$9
$7$7 $0$0 $9$9
$8$8 $0$0 $9$9 $9$9
$9$9 $4$4
Key: $1$1$\mid$$2$2$=$=$12$12 

Find the mean from the stem-and-leaf plot. Round your answer to two decimal places.


Find the mode for the data provided in the stem-and-leaf plot.


Find the median.


What is the range of the scores?

Approx 5 minutes
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Find the mode from the histogram shown.

Calculate the range from the bar chart.

The stem and leaf plot below shows the age of people who enter through the gates of a concert in the first 5 seconds.



Plan and conduct surveys and experiments using the statistical enquiry cycle:– determining appropriate variables and measures;– considering sources of variation;– gathering and cleaning data;– using multiple displays, and re-categorising data to find patterns, variations, relationships, and trends in multivariate data sets;– comparing sample distributions visually, using measures of centre, spread, and proportion;– presenting a report of findings

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