Stem and LeafBy: Eunice Chan, Hillary Cheung, Nicole Leung

IntroductionWhat are stem and leaf plot?Stem and leaf plot is a type of data representation for numbers, usually is like a table with two columns. Tens digit in the left and units in the right.Stems is the label for left and leavesis the label for right.

How do we use the graph? The "stem" values are listed down, and the "leaf" values go

right (or left) from the stem values.

The "stem" is used to group the scores and each "leaf"

indicates the individual scores within each group.

What do they look like? They are basically a cross withnumbers of either side. Valuescan be repeated as many timesaccording to your data.

When do we use it? We usually used Stem and leaf when there are large amount of number to analyze or analyzing scores.

How do we use this plot to analyse?

To interpret this graph, the group together the number on the left side and ONE number in the right side.

Here’s a video for you to watch:

Examples

Why use stem and leaf Plot?Stem and leaf graphs are easy and convenient to use. Datas are presented in a horizontal way and it can be clearly seen in that way.

Advantages and DisadvantagesAdvantages Disadvantages

Easy to keep scores Not very visually interesting and attractive

Very simple to use Might be messy after having too much data.

Can handle an extreme amount of data Data samples with very small range and variance can be difficult to break into meaningful or useful categories.

Can show range, minimum and maximum numbers easily

Real life applicationIn real life, people use them for analyzing large amount number and analyzing scores.- Scores on sport team-Series of temperature -Rainfall over a period of time

ConclusionAccording to our presentation from above, we can see that stem and leaf plots are easy to use and convenient to analyze. The figures can be read easily, especially when there is a whole lot amount of data.

Bibliography "Stem and Leaf Plots." Stem and Leaf Plots. N.p., n.d. Web. 12 Mar. 2014. <http://www.mathsisfun.com/data/stem-leaf-plots.html>.

"Stem-and-Leaf Plots." Stem-and-Leaf Plots. N.p., n.d. Web. 13 Mar. 2014. <http://www.purplemath.com/modules/stem

"Stem and Leaf Plot." Stem and Leaf Plot. N.p., n.d. Web. 13 Mar. 2014. <http://math.about.com/library/weekly/aa051002a.htm>.

"Stem and Leaf Plot." Stem and Leaf Plot. N.p., n.d. Web. 14 Mar. 2014. <http://math.about.com/library/weekly/aa051002a.htm>

"Why Should You Use Stem and Leaf Plots in Data Sorting?" WikiAnswers. Answers Corporation, n.d. Web. 14 Mar. 2014. <http://wiki.answers.com/Q/Why_should_you_use_stem_and_leaf_plots_in_data_sorting#slide=4>

Thanks For Listening!

:)