1.a.
b.
Length of seed
(x cm) |
Cumulative frequency
(< x) |
0
|
0
|
3
|
5
|
6
|
15
|
9
|
32
|
15
|
46
|
21
|
50
|
2.
3. a.
The horizontal axis does not start at zero and a zig-zag line could be included before the 700 to indicate this.
b.
Life of tubes (hours)
|
Cumulative frequency
|
700
|
0
|
800
|
23
|
900
|
66
|
1000
|
121
|
1100
|
199
|
1200
|
229
|
1500
|
250
|
c. (i) Median = 1010 hours
(ii) Lower quartile = 895 hours
(iii) 1090 hours
(iv) 11 90 hours
d. 210 tubes