Statistics - Stem and Leaf Plot

Statistics – Stem and Leaf Plot

Stemplots are much like histogram with the distinction that in histogram, bars are used to check knowledge and in case of stemplots leaves represents precise numbers to be in contrast. Stemplots are additionally referred to as stem and leaves plot as there’s one step with largest place worth digits on the left and at leaf(ves) to the correct. A Stemplot is used to attract quantitative knowledge with fewer than 50 observations.

Stemplots

In a stemplot, left aspect entries are referred to as stems; and the correct aspect entries are referred to as leaves. In determine above, the stems are tens (right here 5 represents 50, 6 represents 60, and so forth); and the leaves are precise values. Stems and leaves could also be labelled as – tens of millions, 1000’s, ones, tenths, and so on.

Instance

Downside Assertion:

Draw Stemplot diagram for the next knowledge factors.

64 82 85 99 96 81 97 80 81 80 84 87 98 75 86 88 82 78 81 86 80 50 84 88 83 82

Resolution:

Step 1 – Type the numbers in ascending order.

50 64 75 78 80 80 80 81 81 81 82 82 82 83 84 84 85 86 86 87 88 88 96 97 98 99

Step 2 – Select step as largest place worth. In our case it’s 10. So every step will characterize 10 items.

Step 3 – Group the numbers based mostly on stem worth.

50
64
75 78
80 80 80 81 81 81 82 82 82 83 84 84 85 86 86 87 88 88
96 97 98 99

Step 4 – Draw the stem numbers as 10’s place-value digits 5, 6, 7, eight and 9 (every quantity is representing 10 items). Draw the leaves as 1’s place worth.

Stemplots