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Do you have big feet?

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Let's ask this in a nicer way:

Does foot size increase with height and do boys have bigger feet than girls?

Let's use some data from Census at School to find out.

On page 2, there is a table using data on height, foot size and gender. These data were taken from 60 randomly selected student records in the UK database.

• Draw a scatter graph with the X axis representing foot length and the Y axis showing height. (X scale from 14 to 30 , Y scale from 110 to 190)
• Mark boys and girls with different symbols or in different colours on your graph.
• Don't forget to give a title to the graph and label the axes and add a key.

After admiring your handiwork try looking carefully at your graph and write a few conclusions.

• Can you identify any students who have particularly big or small feet for their height?
• Are there differences between boys and girls? What are they?
• Do the taller students have bigger feet?
• Is there positive, negative or no correlation?
• Can you draw in a line of best fit?

Think of some questions of your own to ask as well.

Pupil no.	Gender	Height	Foot
		cm
1	F	160	25
2	M	111	15
3	F	160	23
4	F	152	23.5
5	F	146	24
6	F	157	24
7	M	136	21
8	F	143	23
9	M	147	20
10	M	133	20
11	F	153	25
12	M	148	23
13	M	125	20
14	F	150	20
15	M	183	28
16	M	184	25
17	M	125	18
18	F	140	20
19	M	170	27.5
20	F	168	25.5
21	M	131	23
22	M	149	23
23	F	156	21
24	F	130	19.5
25	F	142	22
26	F	159	24
27	F	145	21.5
28	F	162	25
29	M	149	22
30	F	169	24.5
31	M	126	20
32	M	150	24
33	M	170	26
34	F	141	21
35	F	123	20
36	F	122	19
37	M	125	20
38	F	133	20
39	M	165	25
40	F	131	20
41	F	134	17
42	M	158	25
43	F	170	25
44	F	125	15
45	F	135	21
46	F	138	19
47	M	134	20.5
48	M	145	22
49	F	171	25
50	F	181	24
51	F	139	19.5
52	M	147	25
53	M	134	19
54	F	164	24
55	M	127	19.5
56	F	138	23
57	M	180	24
58	M	159	26
59	F	151	23.5
60	M	165	29

How does this data compare with your own class data?

Reproduced with permission from CensusAtSchool – U.K.