Question

The following data is the survival time of a set of patients who had Glioblastoma (it is the time from detection until death): {5.28, 6.36, 9.72, 0.25, 5.52, 0.24, 76.8, 15.12, 11.52, 21.84, 2.76, 5.4, 15, 4.8, 1.08}.

• (a) Construct a boxplot

Answer 1

Number	Values ( X )
1	0.24
2	0.25
3	1.08
4	2.76
5	4.8
6	5.28
7	5.4
8	5.52
9	6.36
10	9.72
11	11.52
12	15
13	15.12
14	21.84
15	76.8

Lowest value = 0.24

Q1 = (1/4 n + 1/4 )^th value
Q1 = (1/4 * 15 + 1/4 )^th value
Q1 = 2.76

Q2 = (1/2 n + 1/2 )^th value
Q2 = (1/2 * 15 + 1/2 )^th value
Q2 = 5.52

Q3 = (3/4 n + 3/4 )^th value
Q3 = (3/4 * 15 + 3/4 )^th value
Q3 = 15

Highest value = 76.8