Stem And Leaf Graph

LG: To accurately organise data into a stem and leaf graph

Test A: 95, 6, 89, 51, 100, 59, 97, 6, 19, 35, 89, 85, 65, 51, 70, 61, 80, 43, 51, 78, 25, 78, 51, 54, 78, 65, 39, 24, 20, 39.

A. Stem And Leaf

0| 6, 6

1| 9

2| 0, 4, 5

3| 5, 9, 9

4| 3

5| 1, 1, 1, 1, 4, 9

6| 1, 5, 5, 6, 6

7| 0, 8, 8, 8

8| 0, 5, 9, 9

9| 5, 7

10| 0

B. Range: 100-6=94

C. 1. Mean=56 2. Median=54 3. Mode=1,6,5,8,9

D. Outliners: 1700

E. The shape and spread of this set of marks: spread evenly.

A.

Mark range	Tally	Frequency
0-20	6, 6, 9, 0,	4
21-40	4, 5, 5, 9, 9	5
41-60	3, 1, 1, 1, 1, 4, 9	7
61-80	1, 5, 5, 6, 6, 0, 8, 8, 8, 0	10
81-100	5, 9, 9, 5, 7, 0	6

0-20   21-40   41-60   61-80   81-100

C. 61-80 Has the highest frequency.

D. The graph in question 1 wasn’t as useful as the graph in number 2 because number 2 was just easier to read.

Test B: 100, 37, 42, 55, 68, 79, 85, 97, 100, 99, 80, 76, 61, 59, 49, 39, 100, 98, 81, 76, 67, 59, 45, 44, 57, 57, 76, 81, 81, 38

A.            6, 6              0       

                 9  1       

          0, 4, 5                2       

          9, 9, 5                     3  7, 8, 9

                  3    4       2, 4, 5, 9

9, 4, 1, 1,1, 1                        5       5, 7, 7, 9, 9

  6, 6, 5, 5, 1                       6       1, 7, 8

     8, 8, 8, 0                       7       6, 6, 6, 9

      9, 9, 5, 0                       8       1, 1, 1, 5

              7, 5                       9       7, 8, 9

                  0    10     0, 0, 0

B. 1. Range=63 2. Mean=69 3. Median=68 4. Mode=0, 1, 6, 7, 8, 9

C. Yes because i put lots of effort into it.